Hopefully this topic doesn't get as bad as it could--apparently, the feud between the fans is pretty bad on this issue...
Personally, I prefer Rebels, as I've always liked contained, character-driven stories. TCW did an excellent job portraying a large-scale war, but it left me feeling as though there was a lack of characters I actually cared for. I knew where most of the main cast was going to end up, so there wasn't much of an element of concern. Ahsoka, Rex, Ventress, and the other popular clones were really the only main characters we were worried about. Nonetheless, towards the end of the show, it was clearly a great and masterful series.
Rebels doesn't deserve half the hate it has gotten. Sure, it's aimed at a younger audience, but the writing and structure is just as cohesive as TCW. I mean, how can you justify lauding one show while you also disparage another show helmed by the same team? Saying "it's too kiddy" is hardly a satisfactory argument, and the latter half of Season 2 (particularly the finale) shows that the show can easily grow into something with broader appeal.
Now, Rebels has flaws, yes...there are many filler episodes and a dearth of extended arcs, but those are really minor. However, we do need more time to get to know the background characters--Sabine in particular, as we know very little about her.
In closing, I regard both shows as equally representative of Star Wars, just different aspects of it. They're both way better than the prequels, and they've created a base for new fans to flock to apart from the films and more available than comics, which is great.
P.S. Don't anyone tell me Ezra is annoying--I shall fight thee! (Plus, I can combat that claim with two words...Anakin Skywalker)