I always carry a Buck in one pocket and I usually have some other brand slip joint or swiss army in the other pocket or maybe even a tactical as of late. Honestly, I have never gotten a bad Buck, while other brands might have blade rub or something not right. But a Buck has been the only brand that I feel confident buying new sight unseen.
And you have to remember that a Buck 110 might cost an average of $40 and a lot of the complaints you see are from people comparing the $40 buck with a $150 dollar knife. I've seen someone online bash a buck 110, saying how they slammed the back of the blade against a cinder block, and the lock failed. Then they stabbed the blade into a tree, the tip broke and how they would never use a Buck 110 lockback for a hunting knife.
I got a 110 paperstone for Christmas last year and it has been in my pocket everyday since then(granted I do carry 2 knives) but the 110 has been used the most. I haven't used It on any deer yet, but for general opening of stuff, cooking and cutting things off in the garden, and camping and cleaning some fish, I haven't even sharpened it yet. It might need it before bow season but as of right now, I could completely work up a deer with it without sharpening.
People also look at Buck's steel on charts and think it doesn't stack up against other super steels and on paper, maybe it doesn't but in real life situations, it might be different. I cut the lid off a tube of roofing caulk with another more expensive brand of knife that had a super steel and the blade showed some microchips. The next tube I used the 110 paperstone with the softer steel and it still looks like new no microchips.