Will you buy an RPG just by the fact that it is an RPG?
No. But being a RPG increases the probability that I will buy it <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
How do you decide to buy an RPG?reviews,word of mouth, forums?
Mostly word of mouth, sometimes even just walking through the shop, look at the boxes and ask the dealer (well, only in two special shops where I know those who sell there).
Do you cheat/ use hacks/editors?
Never, at least never in the first go through. Later perhaps to see what else is possible.
Do you use walk throughs?
No. And if I get stuck completely I try finding resources (e.g. something like this board here) where I can post specific questions.
Do you download the latest patch before you start a game?
When I find it: Yes.
Do you prefer single character or party?
Depends on the game and the layout. Both things are interesting.
Do you prefer single player or multipalyer?
Single player. For multiplayer, I prefer Pen&Paper