overall, even the PT had pretty good main villians. Its the heroes and sub-villains in the PT that sucked.
Best:
1- OT Vader
2- stormtroopers
3 - Palpatine/Sidious
4 - Tarkin
5 - Dooku
6 - ROTJ jabba
7 - grevious
8- Rancor
9- AOTC coliseam monsters
10-tusken raiders
11-wampa
12 - the rolling droids
worst:
battledroids (spare me the whole 'they were supposed to be lame')
nute gunray
TPM sea monsters
geonosians
jango fett (well..he maybe ok..but the whole 'jango was used to make the clones' sucked)
buzz droids
overhyped:
darth maul
overrated:
boba fett
poorly executed:
dark side anakin