Yeah, I only had the 360 because my friends played Halo on it and we all played together. That ended like a year and a half after owning it. Then it was COD and Bioshock, which I could have played on the PS3 as well and online multiplayer for free.
If I get the next gens, it'll be the PS4. I might miss Forza, since I found it less-technical and complex than the Gran Turismo series, but I can live with that.