For the last few years I have had Meindl Borneo Pro, mostly because they fit well, and they don't have a membrane. I really like them though they are quite heavy and stiff. I have two pairs which I rotate daily to let them dry out. I am lucky in that I walk between 8 and 12 miles a day.
I recently bought some custom Russell Thula Thula, which have an extremely thin flat sole. What a revelation. I started out on relatively tame terrain in nice dry weather, but now I trust them virtually everywhere, the soles are so thin and flexible they grip almost anywhere, much to my surprise. (wet steep grassy slopes are the only real problem). The leather is very soft supple and comfortable. I use them without socks. It flies completely in the face of everything I thought I knew about boots. While the function is great to quality is a bit suspect, the soles on the first pair were coming away within a week, but haven't actually got any worse, and I know I can get them resoled easily. The second pair have only been in use a week or so, but there is no break in needed at all. First day out was 10 miles in the sun and there was absolutely no discomfort. They take some getting used to, my feet have to do a lot of work, flexing and gripping, but the movement makes my feet stronger and keeps them warm.
Years ago I bought a pair of Junior boots, very high quality leather uppers, insulated, and great for rock and ice in the higher hills in winter. I screwed some Goat head sole spikes into them for the ice. They don't get much use, but they area great winter boots.
If I have to got out in the floods ( which I have had to do for much of this winter ) I use Aigle neoprene lined wellies, and compression socks over my normal socks to keep them from slipping down.
Worst boots? I have had a few:- Merrel, Scarpa, Rohan, Salomon, Brasher, Zamberlan, Asolo and Karrimor. I only ever bought one pair of each. Once they were done they were replaced with something else. Some because of fit, some because of quality.