i've used so many, i can't count. the last one i used before going to a digital roland was a tascam 488. 8 trks that record 4 per side of tape so you could do some cool reverse effects easily, by simply flipping the tape.
100's of songs done on the 488 and there was one real cool thing about it that i've never found in a plug-in or digital medium, period: you could make a piece-o-sh1t drum machine sound way better by really printing it in the red. an otherwise boring random drum machine sound was squashed into tape compression goodness. i should dig out a cover of gary newman's "cars" (we covered a heavy version like, 3 years before Fear Factory did fwiw, and ours is way better) that demonstrates what i'm talking about. i wish i still had it if not just to reprint drum loops etc. for songwriters, i still think they're a great tool.