I somehow prefer Unicomp to Model M, but I'm not a fan of any Cherry MX switches. I was using MX Blue at work for years before I tried BS, but once I tried the proper switch there is no turning back. I only sometimes use HHKB sometimes, mostly because of the layout, but I also like the Topre, it's pretty much opposite of BS (silent, light and smooth) but it's also very high quality feel which I appreciate.
I also sometimes (but rather rarely) use IBM Model F AT I recently restored. I love the feel, but can't live with the layout.
And one more word about Blue Cherry MX. To me it feels like a cheap rip off of BS...