I have a favorite distance now....8 miles! It's a long run by my standards, gives me lots of time to myself (since I run slow), but not too long that I die (which is what happens at 10 miles right now).
I'm sure in the future my favorite distance will change, but for right now, I love my 8 miles!
Also, running after a HUGE rain storm = mud all over me. I'm hard core now....NOT.