I find commuting a couple days/week is plenty for me. Too often and it seems like a chore.... ride to work with clothes, shower, change up before going home, etc....

I like to commute enough to look forward to it. I enjoy the exercise and saving some gas, being 'green', etc. Given the $$ I've spent on the bike, it will take along time to realize any financial benefit. My other commuting option is a BMW Z3, so I also enjoy taking it, as well.