They're cool. I put a PAC on the big mount which probably wasn't optimal for that ship but being able to oneshot the smaller ships with it (assuming I could actually hit them) was really fun.
I never got the hang of bigger ships. I think the biggest one I had was a Type-7. I think I had a Federal Dropship at one point but I didn't get any use out of it.
Dropship was my biggest. I was aiming for Python I think but fell of then. I also enjoyed the smaller, more nimble ones. I think most of my time was spent in a Vulture.