Dickies hands down are my favorite pants to skate in, I skate the slim straight ones which arent tight by any means, just right.
But to anyone who says they are durable, the new ones ass blows out pretty quick. My black pair which is all I skate in have 2 wholes right through to my underwear and the first time I fell on my knee on a sidewalk it put a whole in them. About to order some more black and khaki pair though. Well worth the 20.99 or whatever they are on clearance on dickies.com