I agree with nostrademons. Make YC a sideline, not a destination or starting point. There's great power in taking charge for yourself.
If you don't feel compelled, it's because your goals aren't inspiring you. You need bigger goals. Possibly getting accepted to possibly work with unknown people on an unknown web app is not interesting enough to capture your imagination.
You have to think of something you really want, something that grabs you, especially if you don't know if you could do it or if it's even possible at all.
That said, some great ideas seemed stupid to "experts" at the time; just trust your own gut feeling, not anyone else's. If you don't have a gut feeling, then you probably don't understand what people want in that area and should switch to another one (or steep yourself in the original a lot more).
If you don't feel compelled, it's because your goals aren't inspiring you. You need bigger goals. Possibly getting accepted to possibly work with unknown people on an unknown web app is not interesting enough to capture your imagination.
You have to think of something you really want, something that grabs you, especially if you don't know if you could do it or if it's even possible at all.
As for 5), have you heard of Pollground?
http://en.wikipedia.org/wiki/Y_Combinator
That said, some great ideas seemed stupid to "experts" at the time; just trust your own gut feeling, not anyone else's. If you don't have a gut feeling, then you probably don't understand what people want in that area and should switch to another one (or steep yourself in the original a lot more).