I'm 39 and I still have lots of ideas floating around. Even at this age I still can do long hours and keep pressing if needed. The only problem is to find a partner who can have the same vision, keep focus and put the necessary work for things to get done. My experience with younger people is that some of those guys loose focus or interest pretty quickly and it's hard to keep them motivated if we hit a roadblock or something gets on the way. Seems they're good for a short term work but bad for getting to see the whole picture, which involves a bit more experience/patience...

I bet there's a lot of younger guys willing to take risks and have what it takes to make it, but so are the guys on their 30s and 40s...