It's no fun if you don't tell us what you've got there... and do mini-reviews!
Quick overview of headphones, from left to right.
Beyerdynamic DT 770s: Comfy closed 'phones. Awesome for techno. Have a spiked high end and a punchy bass line with most amps. Mid range is a little lacking, but these are my choice headphones for watching TV shows and jamming to techno music.
Sennheiser HD 595's: Open Headphones. Luxuriously warm and fuzzy. Both in sound and feel.
Alessandro MS-2 (Made by Grado): Open Headphones. Aggressive, in your face, amazing for rock.
Sennheiser HD 25-I II's: Closed Portable Headphones. Laid back, dark, fun-loving rock out phones.
I've been meaning to do a full review considering my investment...I'll post that on Head-Fi and here when I get around to it. Probably will end up being today/tomorrow.
I am in the process of designing an audio review website...that's really revolutionary in terms of the way headphones/amps are compared and reviewed. So, I'm working up to that with this review :-)