I'm a self confessed Headphone Geek, for recording or practicing bass i use my AKG K141 Studio's they're just awesome, *check out the end of the film Bruno for alot of AKG K141 love*, when i really need everything flat and level i use my Beyer Dynamics, for listening i predominantly use Sony MDR V500's as they can be laid out flat with their movable housing, but these are terrible for recording as they're pretty treble biased but great for trains and when you want to ignore the existance of other human beings, i have various pairs of Sennheisers lying around but i have never got on with them, the 202's and 205's are very bass heavy and i can't wear them too well, they're not great for recording with, i have a pair of Sony MDR V150's and for £12 they blow the Sennheisers out the water. But for the £70 they cost me the AKG's are essential.