You know,it's funny how things go.Back in '86,I bought my first fiver,and fallowed it up 3 yrs later w/a custom built 5st fretless.In 2007 I bought a Fender Jazz 5 because I'd never had a Fender.Two years later I finally got a Stingray.I had intended to get another 5st,but this 4st just had that right feel.I sold the Fender in 2010(fine bass,I just wasn't playing it).24 yrs of 5 string playing,and I have strung BEADG and EADGC on my fretless.I never thought I would go back,but now I prefer the 4st.I'm not sure why ,I've never had a problem w/switching from 4, to 5 ,or 6st,but after all that time ,4 st just seemed to suit my playing more now.I don't miss the Bst in my fretted playing, but to be honest, I use it a lot w/my fretless bass.There really is no right or wrong,just what feels right.And although I have nothing against 5's,when I build my custom,it will be a 4string.....at least that's how I feel now!