I guess it depends on the work you're doing, how emotionally attached you are to the project, and how much you influence it creatively. I can relate to wanting to do something all by oneself, but I personally find that it's much better to work in teams for large projects, not just to split up the work and specialize, but also for their creative input and camaraderie.
There's also the point I was getting at regarding how much of your life do you want to devote towards one project. If it takes five years to complete by yourself, it could potentially take one year with five people--still a tight knit team. It's a personal choice, but I suspect that most devs would go the team route if money weren't an issue.