Allow me to be slightly more specific..
for MTB.. XC bores me absolutely to tears, but DH is, in my opinion, the most fun you can have on 2 wheels. There's simply no other sensation like it. Also, the mindset of the DH crowd is fantastic.
for road, I enjoy TT's very much, and again, the mindset of the TT guys I've encountered has been brilliant.
For regular road riding, it's ok, none too exciting, but the mindset of many of the participants is dreadful. As I said to someone recently in an email, the vain, obnoxious, shallow, prissy little brand-whores really aren't my cup of tea. It's too bad there are so many, they taint what would be an otherwise really fun sport.
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http://anotherdooratthe.endoftheinternet.org
Cycle related blog entries, including a few 5 minute reviews:
http://anotherdooratthe.endoftheinternet.org/category/cycling/