I started off with an OEM silicone skin for my Curve. For about two months now I've used Seidio's hybrid case and I really like it. Very tough yet adds little bulk to the device. I carry it in a pocket and I hope I never have to clip a BB on my belt again. Anyway, my new Fortte case is en route and slated for delivery tomorrow (stupid UPS). I got a glove fit case, I think, it's been three weeks since I ordered it. It's more to try out than dissatisfaction with the Seidio case. I'm something of an accesory whore (often tons of extras thrown in when I sell a phone) and am always in search of the perfect case.
I do not like vertical cases. It's a personal preference but I just don't like the way they feel. I've had some horizontal cases that I've liked but I'm at a point where anything with a clip is just right out anymore. I've had too many negative experiences with a variety of belt clip cases popping off my belt including my 8700 taking an unfortunate tumble into a toilet last summer case and all.
Seidio makes great products. I've had four Berries in the past year or so and three of them had a Seidio product of some kind on them.
That's what I like, at least.