Considering the douglas dc-3 is my absolute favorite (thanks FS9 & FSX!) i love the AC-47 gunship "spooky"
Following in a close second is, naturally, the AC-130 "spectre" gunship.
And after that, the B-17 and B-52 of course... (see a trend here? I like big, heavy, well armed planes. Lol) Then A-10, P-51 and SR-71. of course i like a lot more but it says "favorites" not likes.
Almost went to aviation school though. Realized i like auto mechanics a lot more.