My Caldari Kestrel, from EVE Online. Small, fast, cheap (like my women) and 4 hardpoints for missle launchers or whatever kit you wanted to tack onto it (also like my women).
You can catch it in my old EVE forum sig image.
As a character with over 30 million skill points, I had access and skills to fly 'better' ships in that game. But getting my first Kessie came with a feeling that went unmatched.
As far as designing my own starship, the closest I came to doing that might be when I designed the Imperial FAT-AT. An elephantine version of the AT-AT walkers from the Battle of Hoth. Clients supporting VRML might be able to view the 3D model here:
Notice the deadly Ion Cannon at the front, and the high-tech sensor array in the tail.