I've found the ukulele a lot more rewarding than the guitar and have found I've learnt more about the guitar from it than from the guitar (if that makes sense.) It is a better introduction.The fact it has four strings makes it a lot easier to form chords on. At least for me.

I think I was put off by certain players for a while such as Tiny Tim and some of the hipster types. But it really has won me over in its way.

Eddie Vedder has done some excellent ukulele songs. https://www.youtube.com/watch?v=4W0B-1iF6S4

Then of course there is Taimane Gardner who is ridiculously good.