"Jeans" to me is a bifurcated category. There are your basic old Levi's, Lee, Wrangler, etc., that you can wear tight, normal, or relaxed as you please. Utility over fashion. Then there are the designer lines: Diesel, Adriano Goldschmied, 7ForAllMankind, etc. They are much more fashionable and their fit definitely leans to the slimmer cut.
For me, size 33 7's fit nicely, with a definite awareness of where the inseam stitching is. My size 34 AG's are loose in the crotch but a little narrow in the legs, especially around the knee. I have some muscles, not just bones, so as good as these jeans look they are a little too close for comfort. Alas I'm a slave to fashion ;-)