I'm excited for this one
1: At what point do you think a sim (or semi-sim) racing game is attractive to you?
When there is a good multi-player and a good physics/tire model.
2: Why would you keep playing a game even if you’ve unlocked all the cars and levels?
Online leagues where the best of the best battle it out
3: If you are slow and you can’t beat the fast guy, what makes you to enjoy the racing with fast guy as you are always lose, is that the pursuit of “victory”?
The effort I put into it is what I enjoy
Also, 4: what do you want to have in the kickstarter as the return? Except for in-game content? What else u wish have?
an official league maybe?
5: Will you guys enjoy getting your own designed cars or skins, and level design included in the game?
I already enjoy my own skins :P but building race tracks would be awesome indeed.