For me I prefer to play and write in 4/4 though 3/4 was easier to lratn to play. But 3/4 is generally for Waltz tunes and 4/4 more for quick steps etc, but really it's as much down to personal taste as anything, and some songs can be done in either tempo i.e most people play the Irish song Raglan Road, but I usually do it in 3/4 same with the classic Country ballad The Blue Side Of Lonesome