I didn't regret buying Fallout 3 has the bobblehead and tin lunch box are great display pieces with lots of charm. Age of Mythology was great to with the soundtrack, giant poster, figure, pull outs, ACTUAL AND USUAL game guide and a collection novel of ancient Greek tales.
I regret not buying Batman: Arkham City as it wasn't that expensive where I looked and that statue look very stylish. Now it's gone up again.
I regret Fable III... the edition was fine actually, the game on the other hand...