So far... Sidewinder, Hauler, T6, Cobra
I use the Cobra for exploring, I was going to use the Hauler for exploration but I just hated the windscreen, no explorer feel to it at all.
I have not done any bounty hunting or fighting yet, other than to learn to run. I'm looking forward to eating through a few Vipers someday soon but have not decided how I want to set up to do that, at the moment I just use keyboard and slowly incorporating voice attack. Fighting is going to take a bit of practice if I just stick with keyboard.
I really kind of liked the feel of flying the T6. Slow turning and not very accurate but it made landings inside dock fun. With high level FSD, thrusters, power etc... the T6 flies quite nicely and is fairly quick and can be a joy to fly.
When I first got into a stock Cobra after flying the very nicely kitted T6, I was not that impressed, but after upgrading the Cobra with a very nice exploration kit it is the most accurate ship I have flown.