1. Work
2. Rain. Won't start a ride in rain but will finish one if I get caught in it.
3. Snow. Please excuse use of four-letter word.
4. Ice. Might as well be a four-letter word.
5. Cold. Another four-letter word. 15 F or less. Above 15 is OK if no #3 or #4 four-letter word junk on road.
6. Evening rehearsals for two different choirs in which I sing.

As far as I can tell, tsl laughs at numbers 3, 4, 5, and perhaps 2. Methinks he's a tough hombre.