Hah Yes Reapers wrote...
People are seriously screaming into a mirror over these things. If you think you made the right choice, stand by it and accept the repercussions of your actions. If sparing the rachni queen bites me in the ass in ME3, then so be it. I have my reasons for doing it and still feel its the right choice, come what may (of course, I wouldn't do it again if I *knew* they'd turn evil, that's just arrogant).
In summary, I'll wait until ME3 to draw final conclusions. Really what I think is the main issue with the Paragon/Renegade disparity is exclusive content. Renegade choices generally result in a
lack of content rather than alternate content. In many cases a Renegade import to ME2 is identical to a non-import game. That kind of thing shouldn't happen.
I think both Paragon and Renegade would be a lot more interesting if they sometimes backfired on you. While I do think the
occasional Paragon choice should have an unintended outcome that is negative for Shepard and/or the galaxy, I also think the reverse is true. There should be situations in which going the Paragon route made things substantially better and foregoing the Paragon route made it substantially worse. In other situations going Paragon could make things better but Renegade doesn't make it worse. In others going Paragon doesn't make it better or worse but Renegade makes it better. Yet in others going in Paragon makes it much worse and Renegade much better.
Paragon is about walking the high road, but it has no real meaning if there is never any kind sacrifice for doing so.
Renegade is about making the hard choices, but those choices ring hollow if they were never actually necessary.