Investors sounds like a headache. Right now my site pays for itself, and my life. If I want to take a month long vacation, I go on vacation. If I had an investor, I go back to having a regular job, and answering to someone else. That has very little appeal to me.

This works in my situation because my project is fairly polished at this point, and the content is entirely user driven, so I simply work on sorting out the occasion bug, managing the servers, and carefully planning the direction to take the site, and features to develop. More money, more offices, more employees wouldn't bring anything to the table, aside from more stress. If you have a project that needs people out there selling, that needs people writing content, that needs more developers, or that needs more capital, then maybe you do need an investor. This isn't always the case though.