Python Mk2. Great handling, very tough. It lets me do everything possible in a combat ship without compromises.
I used to be a committed multirole ship user, doing everything in my Cutter and before that Anaconda, Clipper, Python, AspX, etc. But these days I'm entirely specialized.
If I'm not flying the Python Mk2, I'm flying my Type 8 to do Power Play. SCO boost, maneuverable for a freighter, lots of cargo space and slots for various tasks.