SQ2 was my least favorite because of its really dated visuals. It just gave it a dark and sometimes creepy atmosphere...even if it wasn't suppose to be anything like that. The first game was almost like that, but thankfully Sierra remade it.
I'd love to see a SQ3 remake by IA or AGDInteractive.
Are you guys going to include Voice Overs? I'd love to hear that Space Quest 4 narrator one more time.