banjo ukes = traditional folk, bluegrass, clawhammer
baritone/reso ukes = blues, jazz
tenor = classical, fingerstyle melodies
soprano/concert = tin pan alley, ragtime, vaudeville, trad. Hawaiian
This is just a real simplistic view. Really, I think the uke is the instrument that, more than any other, is adaptable to any genre from any era. I reckon you can play any style of music on any kind of uke and it'll sound great. :shaka: