For me it's a phase, and it's a combination of tools and toys. For me, guitars are strictly tools. I have two identical Gibson classicals I got from Ebay and fixed up. They actually sound quite different, but I don't have any urge to upgrade or get something prettier. When I got them I immediately gave away the guitar I had. So for guitars, it's tools only. I don't dream of guitars.
When I was searching for banjos, I had as many as four, but now I have two, identical (except they sound different - go figure). I had more of the urge to have the prettiest, fanciest, and to have one in every room. Eventually they became tools to me and I got it down to the two that sound the best.
I'm sure it will be the same for ukes. I'm trying all the brands and woods, and when I get the "one" I like best, I'll sell off the others and keep two (or so) that I will play and get used to. Then that will be "my sound" and I'll continue with that. I do like to have two, though, in case of emergency I'm not without.