For VFR it is pretty much the minimas (FAA). I certainly won't launch into 1 mile vis, but if I'm already up flying I have dealt with it on occasions. It's no fun and I try to get on the ground as soon as possible.
As for ceiling, as long as vis is good under it, I'll tolerate it down to about 700ft. But if vis is bad as well, then it's turnaround time.
Maximum crosswind I've done is gusting to 28kts and let's just say it was a "firm" arrival. That's about as much as I'd like to deal with again. In fact, it's on camera. You can see my go around and subsequent landing from 2:29.