I tend to drift towards my long lens more than any other. It just fits the things I like to shoot and the perspectives I want more that the others. My max is the 200-600, but I have the 1.4 and 2x teleconverters that can take it up to 1200mm. Even at 600, it's difficult to hold steady by hand and I often use a monopod to keep it steady and in sharp focus.

Nice shots!