Usually I prefer Torps, Belicoso and Pyramid. Generally anything 45rg and up and length depend on time available. Robusto's for the commute home (on the days I need it) Churchills (and a good book) for a longer stay (like when TDY).
Don't go much below 45-50 on the ring though - I've found that the smaller rings get too hot too quick for me.
-K-