I'm strictly amateur, but I have some really nice gear, and I take lots of pics when I am out and about.
I have a Nikon N60(so-so)
Nikkor 28-105 (great)
Nikkor 80-200 2.8 (totally awesome, my favorite lens ever)
Sigma 170-500
I just got back from Yellowstone last weekend, and took 4 rolls.
It was the first time I shot with the Sigma, and I decided it's a keeper.
Won't use it a lot, but it's good for when the need comes up.
I'm still struggling with flash photography, though.
I acquired a nice monostrobe(?) unit for studio type stuff, and I have had some pretty fair luck getting my pics to turn out good.
Fun hobby!