Well, I just discovered this place and I was hooked. After two days my first model is in the WIP forum, and I'm hoping fervently that I won't become completely addicted and spend my entire student loan on filling my room with little bits of plastic!
I'm a hardcore blenderhead - 20 years old, but I remember when there was no modifier stack, no subsurf edge-weights, and only single-level undo! Man, those were NOT the days! Thankfully it's come on a bit since then and I've been happily doodling in it for a total of many hours.