Getting this back to the topic; I guess people realize by now that I'm a big fan of Fallout 3. THAT SAID, my username also reflects my familiarity with the first two fallout games. In particular, I like Fallout 2, though this may have to do more with having a much less rushed timeframe to play the game in than the first; there just wasn't time to fully explore and do as much as I wanted to in Fallout 1--but I digress. To Fallout 3:
I loved this game for it's atmosphere for one. AND I liked how you could just ignore the main quest completely, wander, explore, find things, read journals and diary's from the old world. I loved how you could wander into a nasty deathclaw or pair of Guai's at level 3, just as easily as you might at level 20. It gave aimless wandering consequences, but there was enough out there to make the risk well worth the reward (if you are like me and like exploring).
The atmosphere felt very much like I imagined a post apocalypse to be. Few settlements, the ones there were are small and people are afraid to leave them because of the dangers in the wastelands. While I agree it doesn't feel 200 years after an apocalypse (more like 20), that doesn't make the atmosphere any less fun or appealing. Maybe it doesn't make as much sense for a setting some 200 years after a global disaster, but it's sure as hell fun to wander in and explore.
I hinted at it above, and I'll say it outright here. I like the nature of the random encounter system. Unlike a lot of games where you are unlikely to wander into trouble you can't fight your way out of (they either make monsters scale in level with you or make it to where you can't reach areas with anything too powerful for your character to handle at a given level), you could get yourself in an impossible situation and have no choice but to run. And in the case of wandering into deathclaw territory by mistake (or randomly encountering one far away from where you normally find them), it really gives you a sense of panic because you know you have to get lucky to get away from the beast. I've found myself in similiar situations in Fallout 3, whereas in games like Fallout New Vegas, once I learned where such monsters made their homes, I could avoid them entirely if I wished.
What I'm saying is there is a genuine sense of danger in Fallout 3, when you are wandering the wastelands. You actually have to think about your gear and whether or not you're willing to risk your life to go exploring for loot at any given time.
I liked a few of the characters. Moira, Dukov, and Amata (in that order), where three of my favorite characters in the game. In the case of Moira and Dukov, both had very unique personalities (and somewhat over the top), which made them very fun to deal with. While I can agree a lot of characters felt flat, (especially the main characters), there were a few with sufficient character development--although I will safely say the game left a lot to be desired in this area.
I enjoyed the variety of weapons at first, but I am not so sure anymore. I think the expansion packs add some fun new weapons, but these days (especially in light of New Vegas), I find myself wishing for more weapon types (or subtypes) in Fallout 3. That said, there's enough to keep things interesting for me.
I like how you can pretty much play how you want, with any skillset. Granted, the game gives you STRONG incentives to be skilled in some form of combat, you don't have to worry about not being able to survive if you choose to be a melee or hand to hand specialist (in fact, if you are a hand to hand specialist, with a little luck you can even go toe to toe with a deathclaw!) I like that, not being forced into a set of skills I don't want, but being able to play the sort of character I want to play.
I like how so much backstory is available. Yes, maybe it doesn't matter in the scheme of things, but wandering into a farm and discovering what happened to the previous inhabitants 200 years ago is an awesome thing that really makes you feel like you are a part of this world, and in an odd sort of way, makes you care. I enjoyed exploring old vaults, learning of the experiments that went on there. I liked pouring over old computer terminals to find out what happened to long destroyed or vacant buildings. For me, that was so much fun, and made going out and looking for loot and scavenging all the more fun.
I like the over the top gore, which comes right from the old school fallout games. Violent, gritty, and sometimes rutheless, it lends a very "wasteland" atmosphere to the game and I think the recent games did an even better job in that regard than did Fallout 1 or 2 in most cases. That said, you have the Beth-Censor that won't let you kill quest essential characters which sucks. And children, so no child-killer reputation either. But still, even without that,Fallout 3 does a good job of making the wasteland feel like a dangerous and gritty place, sort of like Mad Max.
THe replay value. THere is a ton of it, and a lot of incentives to try different character types. Because of this, it makes it a lot more fun to go back and play later. The same can be said of New Vegas, though the fact I have played FO3 more is quite telling, I think. Especially important to me though, is the random encounters that you don't get in new vegas--I like to be able to accidentally wander into danger by sheer chance on occasion, instead of being able to avoid it completely at a whim.
Those are my reasons for liking Fallout 3. You might notice I didn't mention anything related to lore for the most part. That is because, while I love Fallout 3, and I do think some lore-breaking arguments are slightly exaggerated (I particularly take issue with complaints about the BoS in FO3 as well as the Enclave), I do agree that it pretty much slaughtered a lot of established lore. As a sequal to Fallout 3, regarding established lore, it's hard to defend, if not impossible. But as a **game** it is very fun to play, and keeps me coming back. And, it's easy to get lost in the universe that is fallout, and wander this post apocalyptic wasteland, forgetting centuries old lore and just enjoying the game.
It's a fun game to play, and there's a lot of great qualities. And it's kept the Fallout series alive. You have my reasons for loving this game--but I'm just one fallout 3 fan, a drop in the proverbial bucket of critics.