I currently have 4 ships:
Sidewinder
(Little Green Man) - No idea why i still have this ship to be honest!
Cobra
(Odin's Spear - Bounty hunting/Combat Zones
Asp
(Stellar Dreams) - Exploring
Type 7
(Ugly Radish) - Trading......lots of trading!!
Will swap the Type 7 for a Type 9 when i have more credits and i'll sell the Sidewinder at some point, probably replace it with an Adder for zipping between my ships.
At some point i'll also upgrade from the Cobra for a better combat ship but i don't think i'll ever sell her, too many fond memories!