I think the whole problem with the prequels centers around the fact, that Lucas is in fact a very good set designer; but a poor script writer - and was given utter and full control of the new films with little quality control....or "too much" quality control.
There are way too many cameo appearances, way too many flashy sequences with little time for acting, real drama (falling to the dark side? come on, Machbeth did it a hell lot better). What the studios were consered with was getting another cash cow and milking it for all its worth, not in building the SW universe.
They put a man in full control, who himself admitted that he has his fallings as a director, and downright underlined that he can't write a script at all.
Don't believe me? Check out the special edition of THX1138 where all of this was said and outlined.
Back on the core of the topic:
As is the prequels can't stand on their own. Phantom Menance is an attrocity, while Attack of the Clones is an action flick with only whispers of the classic adventure shining through. Revenge of the Sith is finally something worthwhile but most people can't help but woe the missed opportunities: Griveous, the fall of Anakin, the stupid sequences with the droids etc. etc.
However there is another SW canon out there - though of lesser precedence than the films according to the "official canon guide": the SW comics published by Dark Horse.
DH IMHO has singlehandedly managed to salvage the whole era. Though I'm still have mixed feeling about the PM setting (way too many and way too sanctimonious jedi), from the Clone Wars and onwards they have managed to create a really captivating and fleshed out continuity with the classic trilogy.
When you add in the latest books from Karen Traviss about the Republic Commando/Clones you even get something definitly different but altogether undeniable SW in there, that's finally bringing something new to the overall picture like Zahn did with the Thrawn books or Stackpole did with the X-Wing series.
So I wouldn't be that adamant in offhandedly denying anything prequel. I'm a harsh critique of the prequel films too, but there's more to the era than the films itself with some really talented people working on the media, who themselves tried to address the problems our whole lot like to woe about.
Bottomline:
It's good to stick to the original source, the original feeling. It's even better to bring something new to the SW gaming...but don't forget that from time to time the magic was rekindled (like Bioware did with KOTOR).
My closing line is all in its due time, you yourself may find a piece of the Clone Wars or the Old Republic that's close to your heart if you let it give a chance. When the time comes you may feel inclined to connect the SWC with that part.