For me, certain characters are bad enough I hardly consider them part of the current line...
Take Tarkin for instance. His sculpt is horribly dated, and while his likeness is actually not horrible, his body sculpt is attrocious compared to any other figure who would be considered "similar" such as Chief Bast, or General Veers.
On the other hand, look at Han Solo Bespin... i think the POTJ figure looks very nice, and it does really fit in beside a VOTC Han, a new Sandtrooper, whatever. However, the figure's nowhere in the ballpark of being as good a toy overall, as say a VOTC Han. The articulation's lacking, the headsculpt can be done better these days too... So yeah, I want that ultimate Bespin Han. Same goes for Hoth Luke, and the Rebel Fleet Trooper (and many others). Does the last Hoth Luke look good? Sure, but he hasn't got a removable hat, working holster, or much articulation at all... The Fleet Trooper, same deal... Lacking articulation, a pre-posed/designed sculpt in his chest as well as his feet, no working holster, ****** articulation...
For me, resculpts are often times vastly higher on my list of wants, than say Mosep. Not to say I don't want Mosep, I do, but the RFT and Tarkin are probably my #1 and #2 figure wants from ANH... I'd say one of the officers who had lines would be 3rd, which is sort of new... I think for almost every movie, I probably would vote resculpts as my #1 though. The Obi's we're getting may have changed my tune on that though.
Just off the top of my head though, I want a new Evazan, Ponda Baba, Fleet Trooper, Tarkin, Ultimate Tatooine Luke, DSE Luke, ANH Leia with removable hood, and I'd even take resculpts of some X-Wing pilots (Biggs at least) and the like. I think my resculpt list is even longer for Empire, and possibly Jedi as well... It's definitely a big list for Phantom Menace as I really don't care much for pod racers and I feel just about every "Naboo" figure needs redone (all 3 soldier types, etc.).
I love when I get something like the Hoth Rebel Soldier so I can retire those POTF2 figures.
That's a good feeling getting that definitive figure.