My favourite one was the only one I ever kept! I can't even remember the species. Damon, maybe? I vaguely recall picking it up at the one British Tarantula Society show I attended. I definitely remember it was one of the fastest things I ever kept, and I've had teleporting huntsmen and pokies.
I always liked amblypygids, the way they look so different from other, more familiar arachnids. I may pick up another one or two if I ever get an invert room up and running. I need the space I currently have for cockroaches...