And chose the fretless because?? Intonation not good enough on the fretted?
A big part of it was the "feel" of those strings. I had a chance to play a fretted one on a couple of tunes at a gig a few weeks ago, and was adjusting my playing to those (to me, unusual) strings. I found that I didn't like the way they felt against frets and wondered what the fretless one would feel like, and what that would do to my playing.
I had a fretless acoustic bass guitar when I first started seriously learning bass, but it was not a good "learning" instrument, so I've been playing fretted since. But there are certain techniques that I've been trying that work nicely on a fretless instrument, and I no longer had the one I used to own.
When the opportunity came up last weekend to try out a fretless U-Bass for an hour or so with our `ukulele ensemble, courtesy of the fine folks at Dusty Strings, I took it. It felt good, it sounded good, I wasn't having intonation issues (beyond my own limitations as a player, that is), so I decided to go for it then and there.