I use their warm weather clothing, specially their PFG fishing clothing very frequently (I'm a fisherman myself). I mostly use their Omni Shade products, and a few Omni Dry products. Their fishing pants and shirts are awesome, although their fit is too large for me -I usually wear a size Medium shirt (sometimes even a size Large T shirt), whereas I need size S shirts from Columbia to fit properly.
I also have a set of cold weather gear, specifically snow jacket and pant combo. They've worked well the few times I've used them, but living in a tropical climate means they rarely get used.
I have no personal preference for when it comes to travel or adventure clothing, I've used Exofficio, Under Armour, Mountain Khakis, Carhartt and other in the past with good results, but Columbia is what I own/use most by far. Mainly because they're cheaper than most others, they perform very well and last forever.