I don't know who had it in it's signature long time ago, but it was a wise sentence:
"the main reason most gameprojects fail is due to the lack of leadership".

I find coörperation very difficult. Me and my cousin have tried making games together several times, but even with direct contact using "skype" we haven't finished just one pesky little game, probably due to the lack of leadership . I mainly try to be good at everything, modelling, skinning, scripting, level design, etc., like my cousin. And I think that's where it goes wrong. We often want to work at the same thing, but that doesn't work .

I guess it's nobodies fault when a project fails, because there is simply a project-leader neccesary, and not everyone is good at that, like me .

It's never bad to try though.
Good luck with whatever you are planning to do,

Jostie