So, I've played it for approx two hours now. My opinion so far:
I like the game. I see the flaws that it got due to console -> computer port, such as the sucky camera controls. Which are really sucky. I mean... I can life with it, because I am skilled... played Metal Gear Solid 2 on computer, while not using a gamepad and finished the game a few times. So I could life with even more worse controls.
The camera is shaking a little bit, every once in a while, when I look around. I never saw this in any other game before and I don't really understand, why it's there at all. The game runs on the unreal engine after all and you would guess that this engine would never produce something like this.
Anyway...
I like the dialogues so far. What I don't like are the subtitles. In the german version, the words are jumping very fast and you never see the whole sentence. Due to this, reading the ---------- sentence ------------ always has ------------ a kind ----------- of jump --------- in strange places. This is bad for the reading flow and now I concentrate more on listening to the english dialogues than reading the subs. Dialogues itself are nice and I like to go through them. In Mass Effect, I always felt the need to skip to my answer possibilities, to get it done already...
Also, based on how you say stuff in the dialogues, you can get perks and traits, beside the reputation changes with characters. Also you can get more information about something, witch can make you a mission easier, etc. This stuff is great, I love it.
The combat feels ok to me as well. I know that I hit a target based on my characters stats and I have absolutly no problem with it. Wasn't different in Bloodlines or Deus Ex. In Bloodlines I hated it, because using guns felt bad. It feels smooth to me in Alpha Protocol, so I am absolutly fine with it and wouldn't change it.
Melee fighting is really strong, like everyone said. But keep in mind: If you don't put any skillpoints into the melee skill, it will be shit soon, as I noticed. Some enemies got hit a lot by me, but the damage was rather low. Also you make a kind of "insta-knock out", if you catch an enemy who don't notice you ("stealth kill"). This is cool. That's why I am playing a sneaky character.
So far I am using mostly my pistol, because I am a silencer-nazi. I like to sneak up to the enemy and take them off with one bullet critical into the head (didn't saw a silencer for the assault rifle so far). Then again, I noticed, that I could mostly use the assault rifle too, which leads to the named "strange ai behavior". As long as no alarm is activated, you can shoot loud in a specific area and nobody else cares. There can even be a big machinegunner, throwing bullets at you, as long as there is no big alarm, you have to fear not much.
And then there is the other situation... you do very little and big shit comes down with alarm, which sucks, because I don't want to activate the alarm. I am a cool stealth person, who is a shadow and not billboard with sound booster.
The minigames, I forgot about them. Lockpicking on pc version is super easy. No difficult in doing this... feels like lockpicking in Fallout 3. It's there, it's shit easy, it just steals your time. When it comes to the hacking minigame... holy shit, I needed like 5 minutes to figure out, what to do. By now, I get it pretty often, but it's stressfull and after a while annoying to the eyes. If I could, I would keep that out of the game. The bypass minigame is medium-difficult. Not very hard, but bleh for the eyes as well. Same as hacking, I would love to throw that out of the game. In fact, if it would be me, I would throw out all minigames, because I hate such minigames in my games. Games. Games. (Games.)
Sometimes, you can skip minigames with an EMP. This is nice, I will use it often and hard.
So. After playing a bit over two hours, doing three missions, I like the game. The characters I saw so far are interesting and I think, I started to like at least one already. Will continue to play, for sure.