Personally, if I have to wear long pants, I prefer jeans. At least that way I avoid being tagged as pretentious.
I do agree with much of Wisguy's rant though. And I do wear jeans on courses where they are allowed. I've practically lived in them in cooler weather since I was in grade school, so for me they just feel right. The arguments that they are uncomfortable are pure bunk.
I wear relaxed fit Wranglers usually. Plenty of room to move in, access pockets, etc.