I don't mind repaints because G1 was, after all, based on them (okay, retools I guess). This doesn't mean I will buy them all though. I only get the ones I like or are a real different character. Bumblebee with a new hat is not really enough.
What really bugs me about repaints now, though, is that they swap factions! I can understand Teletraan 1 scanning the same vehicle for a number of similar TFs within their own factions, and I know the new movies changed that a bit, but at least keep the same moulds on the same team!