I've only been playing for... wow, less than four months? And I just purchased my third... I'm getting a bit obsessive, even though I'm still s** as a player.
Kala KA-S (soprano, thus the S.)-- It's a cheapy, but it's a damn good one, in my book. I love the sound of it, it's easy to play, and while it's rather plain, I like the looks of it.
Mitchell MU-70 (concert)-- I bought it on a whim at Guitar Center. I'm not so crazy about it, but I think it's the strings. I have some new ones on order. If they don't help, I might ship 'er off to ebay...
(And finally, it'll be here by Wednesday...)
Republic Reso-Relic Concert Ukulele-- Shipped today. I've heard mixed things, but the people who don't insist that the only good resonator uke is a National seem to say it's a pretty good deal, even if it needs a little improvement outta the box. I've seen SEVERAL reviews that compare it favorably to a Johnson, and they cost almost twice as much. I'm psyched.