I'd say half my gaming time is on an emulator actually, with the Wii still being my fave.... Usually SNES, some Mega Drive & NES. My PSP's also crammed, PS1 (if you can call that emulation) & GBA being played on that... DS - that's for Game Boy/Color! Also got SSF & Mame on the comp, and various on my phone, but I rarely use those.
Must say I really only play games I own[ed] though, actually only getting into the whole emulation thing after finding out I could play my Sieken Densetsu 3 in English that way (oooh, going back to the 90s too when I found that out - gawd that's scary!) - got completely stuck in that game on my SNES and was gutted as I'd paid 85 or so quid for it!