Yeah, wide angles are tricky I think. I usually will only take it if I know that I'm going to a nice landscape spot where it will work and/or if there is a good sky/good weather conditions. And it's usually important to have something up close that can work as foreground since everything else becomes so small. But when wide angle works, I really like it. A nice looking sky stretched out by a really wide lens can be absolutely beautiful. Tele is awesome for landscapes also, like you say, to isolate stuff. The focal lengths I don't really like are the "in between" ones. I have a 28-75 and a 50 but I hardly use them because I always end up wanting either something wider or something longer!