I work as a MD, MSc training to become a psychiatrist and I pull a lot of nightshifts / it also involves a lot of waiting and fragmented nights with little sleep. I am very happy to have my gp32, gba, nds (I rotate them a little) with me.
GP32 Emulation all the way, the original games I bought for my NLU won't function on my 2nd BLU device.
GBA Zelda and quite a huge collection of carts and a gba cart size 256Mbit flashcart for nes, sms, gb, reading txt files emulation through pogoshell and plugins - don't run GBA games on the flash thing.
DS all them great new games: Metroid Prime Pinball, Mario64 DS, RR64 DS (both are actually almost N64 versions). I am dying for a waveracer64 DS with more polygons. Rayman is quite nice aswell. I am hoping for more of those adventure platformers on the DS, it's coping quite well with that gameformat. Of course I can 'emulate' on the DS too in GBA more. But I do find myself bringing the GBA along on some days, I have a GBA-SP and old fashioned one, and the latter fits in my big hands quite well (6'8" dude typing here).
I am actually contemplating a micro gba, does anyone have experiences with that little device, fits in one of my pockets quite easily. Excellent for a quick game when I hang around the ER and there is nothing to do.
I do have a Famicom, NES, GB, SNES, N64, GC, Tg16, Videopac G7400, Dreamcast, Genesis/MD, Saturn, PSX, PS2, Xbox, MSX2, C64, Vectrex that I use for gaming aswell...I end up handheld most of the time.