I'll take the crazy whale-humping probe from The Voyage Home...
I used to be obsessed with the Nebula-class ships from TNG. I used to kitbash them from Galaxy class kits and Miranda-class kits... occasionally with some DS9 Runabout mixed in. Ah, those were the days.
I really do enjoy the XI Enterprise... both in size and scale. Beautiful ship. Makes a great desktop background.
Also, I like the Ambassador class too, very good design... I've never been a big fan of anything Klingon, Romulan or really anything else... The original Ferengi ships were cool (before they became the circus clowns of the galaxy).