There really isn't much. He's OCD about certain things and I'm OCD on other things and there is other shit we mutually clutter then pick up before company comes. It works out well since we're always tidying up opposite things, and it has made us aware of one another's OCD preferences, increasing the wonderful overall OCD possibilities. Same political views, religious views, views on parenting, decorating preferences, holiday and other traditions, etc.
I can usually put down something I'm doing fairly easily, but if he's working on something, he'll keep at it until it's fixed/done. If it was something useful, that would be awesome, but it's always computer stuff, beer stuff, general boy hobbies. And he leaves hair on the sink when he uses his beard trimmer. But I can't say shit because I get makeup dust on the sink in the mornings. There's really nothing I "can't stand" and anything remotely negative is outweighed by how much he helps me around the house and the fact that I'm laughing/smiling for most of my day. :3