Beyer DT1350 - Tonally stunning, most neutral headphone I've heard so far, insanely short decay, it can handle any amount of splashy midrange pads and synths and keeps them all under control. Very revealing of source, but rewards you when you have it. One of the only headphones I listen to anymore, actually; it spoiled colored cans for me forever and started my love of linearity. Not the biggest presentation, which leads to my second pair, but it's big enough for portable use, and the seal you get with these is phenomenal. There's too much for me to gush over here; every section, the DT1350 excels at, bar the aforementioned soundstage/width.
Pioneer SE-700 - I want to hear these amped with an E9/Lyr before replacing them; they take SO much power. Think a DT1350 with a much larger presentation, but missing the bass and a little of the treble on the very top. Even though it's rolled off, these are very linear inbetween, which I admire, and their presentation is larger, so I use them as a full size alternative to the DT1350s at home. Probably going to replace this spot with the K701 soon.
Grado RS2i - A genre headphone, but it does it nicely, although the nasal quality of the mids keeps me from listening to them all that often, I really have a fetish for neutral/linear tonalities >_<
Stanton Dynaphase Sixty - An interesting one, it's more for fun and bass than anything, it has quite awful decay, exhibiting the standard splashy mids/bloom that 70s cans are known for, but it has a stupid capacity of volume and bass, and a nice tonality when the vents are sealed, kind of like an M50 that doesn't suck. Also they're gorgeous, but massive, yet comfortable.
Everything Else - I just don't listen to anything else >_>