Carhartt fan here. Been rocking the B73 double front loggers for many, many years. Loose fits are super comfortable for me, and one of my favorite things about them is all the pockets, wallet, keys, phone, knife, and a spare mag all fit comfortably. I like the denims since the canvas take so long to break in, and trust me the denims are plenty tough. Slag and such will burn a hole or two, they aren't fireproof, but otherwise they're hard to ruin.
Some may not think they're still as durable as they used to be, but I was wearing a pair along with a Carhartt canvas jacket when I totalled my bike a few years ago. Bounced off a dirt bank in Idaho canyon country at about 50-55. No memory of it, but know I slid on my back for a good 80-90 yards. Got stitches in my knee from hitting something, but no tear. Back pocket caught and ended up ripping out most of the right side of the seat, probably from catching on the road, but other than that they were barely scuffed. The jacket had a minor scuff and some blood, but after I washed it you couldn't tell unless I pointed it out.
Some think they're overpriced and not what they used to be, but they're still made of 15 oz denim and after how mine stood up I'd beg to differ. If you shop around and have patience you can nab them for under $40, and seconds cheaper than that, and I never could tell why the few pairs of those I've had were being sold as seconds.
Not knocking any other brands, especially since I haven't felt the need to try them, just my $.02 worth on these.
Winston