I regret buying a

[Azuren]

I honestly sometimes regret how much I put into my PC, but it's based on my mood.

I always ended up regretting get a 360 each time I got one. It always felt like a waste of money to me afterwards.

 

EDIT: Actually, I regret every single Dynasty Warriors game I've bought, as well as most JRPGs. I keep telling myself I like them, and then I remember that I only like them when they're really good. Examples are Legend of Dragoon and Sengoku Basara.