I can't imagine commuting at anything but full-on effort. I love the feeling of arriving at work completely wasted and then having a shower and a cup of tea restore me.

Probably because it's a short ride (8-11 miles each way). On my long weekend rides I take it easier, although I still feel just as knackered at the end.

I am sort of curious about doing a slow commute.

Edited to say that although as I say I can't imagine it, I still am kind of curious about it...