I spent xmas day with the 85/1.8 glued to the 7D taking shots of kids running around, here's some thoughts:
AF is allegedly faster than the 85/1.2, less weight of glass to move around. Even so, there were a lot of OOF shots because they moved so fast (had the flash on and about 1/200s).
Even at f/2.8 the DOF was very thin, couple that with the fast-moving kids and there were a fair few sharp ears and blurry eyes/noses. The 85/1.2 may have a wider aperture, but if I had one it'd be stopped down to f/2.8 also.
For sit-down portraits and slower-moving subjects, i'd have already bought the 85/1.2 if I could afford it (it's on my long-long-long term wishlist, right behind the TS-E 24, 200-400, 1DX, and winning the lottery).

For macro with the 85/1.8 and others using Tubes, here's a test I did, you can almost get to 1:1 max mag.

Actually, now that I think about it, combine those two, and I think i'm going to recommend the 100mm f/2.8L Macro. You get 1:1 macro, you get a very-nice IS, you get a fast-aperture/usable-DOF tradeoff. The only downsides are that you can get a background-meltingly-fast f/1.2 (which would need a very nicely still subject and live-view MF), and you may need to step back a few feet compared to the wider lenses (how long are the rooms in your house?)