Crucible is technically a Vanguard, just waiting for Repair mechanics to apply the CCU. Already get a Connie loaner from the Corsair so I'd rather have a Vanguard to play around with in the meantime.
Nomad, Cutlass, and Corsair for varying levels of daily flyer-ness. Cutlass when I have a buddy to tag-team with, Corsair when I wanna roam around long distance and host a party for 4. Comfortable bringing the Cutlass into a combat role against most NPCs but if I'm going into PVP then I'll just tag along in someone elses ship most likely.
Vulcan, Starfarer, and Crucible for varying support duties as necessary. Fueling and repairing covered from patch jobs and jerry cans in the Vulcan to complete overhauls and fleet fueling capacity. Apollo for medical/SAR gameplay.
Caterpillar for cargo hauling and still hanging on for hope of modules, and I've had it since 2014 so I'm quite attached :)