I haven't been playing long but I chose a Yonex (RQIS 1 Tour light) because it felt like a nice racquet and I got it cheap ex-demo (I was a using a Wilson N5 before which was too light and too head heavy)
I also quite like the isometric headshape, it does seem to have quite a generous sweetspot for a smallish headsize (95sq.)
But really I haven't been playing long enough to make any well informed racquet choices but I like the Yonex so far and would buy another one most likely (would like to try a heavier frame at some point, still building up the strength required though, don't want to do my shoulder in.)
Re Yonex's popularity, or lack of it, that's a plus. You don't want the same racquet as everyone else do you?.