some questions for pc users if you have a spare moment.
what system os do you use primarily for gaming (linux/mac/windows?)
Windows 8.1 (I've tried linux in the past (8+ years ago), and it always had a tendency to self-destruct, or be harder to get anything done with, and not be able to run things I wanted to run in it (e.g. games))
do you prefer games optimized for your system or don't care if it is cross-platform (at a loss of performance)?
I have friends that use linux and for multiplayer games it is nice to be able to have cross-platform multiplayer. However I don't see why that would require a loss of performance, unless you're intending to make a really bad console port (in which case it isn't the cross-platformness which is at fault, but whoever did the crappy unoptimized porting job)...
do you prefer single vision games or ones that are extensible through a scripting language (lua)/modding support?
It depends on the game. I don't particularly care whether or not Tomb Raider is moddable - I played it for the single-player story. For Skyrim, the story is weak and mods can make the game more fun. For Morrowind, the story is strong, but it's old enough that mods can improve the rusty gameplay and visuals. Crusader Kings II, on the other hand, is a strong game by itself, yet is an ideally suited game to be modded, since mods can adapt it to other settings, alter the rules, or build on the gameplay.