Haha, I wouldn't say I'm a snob (much), whatever works for the individual
However I will say that I've never heard a decent overdrive/distortion/fuzz from a stock Multi-FX. I've got a Boss ME-50B, and it does everything extremely well apart from drive lol.
However given the choice, yes, I would use nice single pedals over cheap digital multi's
That said, I tried an old Zoom 708 the other month for the first time in years, hilarious, it was so horrible that it was cool!
Si