There is no right or wrong answer, just personal preference, opinion, or habit.
Where do you do most of your riding? Can you describe it?
What is the condition of those routes? Include potholes, glass, other users, trash, scenery, behavior of others, or anything else that influences the quality of your ride.
EDIT: OH MY GOSH!!!
I left out offroad altogether! DOH!!
(just click "other." )