For complex reasons, I didn't bike in to work today. I've developed a theory - the more you bike, the more you can actually tolerate (I won't go as far as to say "like") the tube. There's a novelty about it and I quite enjoy doing a bit of people-watching. And you're not completely knackered at the end of it.
I never thought I'd hear myself advocating tube travel - but once in a while it's just about bearable.