Wow this is tuff lol. I love the whole vintage line, but after thinking for awhile this is my Top 5:
1- Luke Bespin (Orange Hair)
2- Boba Fett (Tri-Logo)
3- Greedo
4- Blue Snaggletooth
5- Yak-Face
FYI - could have added Paploo, Romba, Squid Head, Bib Fortuna & Amanaman their some of my favorites also but I'm satisfied with my top 5. For now lol :?
This is a hard one to decide but hey ho here is my stab at it;
Darth Vader
Stromtrooper
Hoth Stormtrooper
C3P0 (must of been the dazzling gold effect that spellbinded me as a kid)
Jawa
Honourable mention to tie fighter pilot, yoda and boba fett.
Now I might replace one of my top 5 with the original princess leai organa figure. Didnt much care for this figure nor did I have her in my childhood collection. Now howvere in the fullness of time I have grown to appreciate her 8)