1) Because you CAN roleplay, and like any game you can do that within limits. Last time I checked, you don't have to hate Cerberus in ME3. You just can't support them. I'm not actively advocating anything, I'm just not complaining about ME3.
2) Shepard has PTSD, or maybe he just dreams. Deal with it. It's not even slightly a real problem for character definition.
3) Ok, so now you're just someone who knew what they were buying, bought it anyway, and just wants to complain.
4) Yeah, I'm pretty much denying that. Your description of how you could respond about the Alliance in ME1 and ME2 is a massive overstatement. I believe the renegade response to the ME1 inspection has the word "respectfully" in it. I understand that your ability to be negative is diminished in ME3, I just think its irrelevant, and it was wise of the devs to focus their resources on other more meaningful parts of the story.
1) You've changed your position on this. Yes, I know the limit and extent of RP ability in a game as far as actions go, and I know how far it can go as far as behavior or attitude goes. You just went on earlier about how it's bad to support Cerberus, and how Shepard has to hate them. Now you've said that you don't have to hate them at all, you just can't support their actions in a way that advances the plot. I'm not stating that. I'm stating that I wish there was an RP ability to not have to feel guilty about working for them. I wish I could RP my Shepard to be proud of what he did with Cerberus, to be cool with what Cerberus was trying to accomplish, and to express sympathy for their goal for the galaxy (prior to indoctrination).
2) It is a problem. Telling me that it's not a problem for you does not negate that it might indeed be a problem. It goes along with the dream sequence's being pretty mixed in their reception. I'm not going to pretend that the reasons are the same for every complaint, but mine was the fact that too much of it was spent 'missing' old friends and worrying about all the dead people in the war. Suffice to say, that really goes against how I portray my Shepard. Dream mechanics and content aside, I wish that they gave you a 'real' opportunity to talk about how the war is affecting your Shepard, especially in relation to the losses of civilians, etc.
3) You've just tried over-generalizing my statement to make it appear ridiculous. I'm not complaining. I'm stating something that I wished for the inclusion in the overall series that would make the series better. It doesn't hamper RP ability. It allows me to define relationships and interactions with other characters. It doesn't even have to have the party dismissal system (though that would certainly be welcome). My overall statement, going back to where we started, is that I arguably couldn't define relationships as well as I had in the past in ME3 compared to, say, ME2. In ME2, I could make Miranda or Jack hate me based on choosing who I sided with in their argument, as well as rejecting Jack for Miranda later. I could have Tali hate me due to siding with Legion or releasing information about her father. I could have Thane be bitter over the path his son has started down. I could have Zaeed be relatively pissed off because I squandered his chance to kill Vido Santiago. And I can't do that in ME3.
4) It really wasn't. The use of the term 'respectfully' sounded very sarcastic, as if Shepard was taking his power and throwing it into the Admiral's face. I'm in the military myself, and if I said 'respectfully' in that manner, I can guarantee you that I'd get a very lengthy counseling statement from everyone my Commander up to whoever I said it to, and it would probably be a career ender at Promotion time. On a separate note, you could lay into Hackett about why its not your job to go running around fixing his or the alliances problems, and be very up front about it. In ME2, as I said, you can be very condemning of the alliance on multiple counts. And yes, in ME3, as you and I agree with, it was greatly diminished. We disagree on the relevance of it however. I consider RP'ing to be the most integral part of the game, not the story. Considering that the game is an RPG (it says so on the description for it), this is really not an unreasonable expectation that I have the ability to RP to a high degree. Granted, I get that BW and/or EA used a loophole to define it as an 'RPG' by adding some elements into it while taking it as a chance to tell their story (which really wasn't as meaningful as you describe, considering much of it was very one-sided in its portrayal of events and history of the game, and the conclusion was a spectacular failure of narrative execution, even if the concept wasn't altogether terrible), but does that mean that the story has to take precedence over, I don't know, the main point of the series? It has to come ahead of the player's ability to define Shepard as broadly as possible? If that's the case, BW took their story way too seriously in my opinion, and I believe you did too. Mainly considering that the story isn't so meaningful to me once your ability to impact and inflect into it is diminished.