There's one quote that reminds me of all this:
"Graphics don't make a good game"
Speaking of (especially store wise) RM has a lot of resources but at the same time is limited still. There are a lot of games that use these resources so seeing the same graphics all the time could be a big let down and not refreshing. I wish I a graphic artist myself to contribute but I am not. I do buy what I can so show support to the community but still...
While I myself aren't picky about the resources as a player or even as a developer. Down the road, I'd hate to constantly use the same resources especially when developing a project comes faster than the actual resources. Again, as a customer or developer I don't mind much but there a lot of folks out there do. You can only get a "new game" with the same resources so many times before it gets old.
I hadn't really considered this, but I agree completely. Pick out your favourite RPG. Now imagine a company made a completely different RPG, set in a completely different universe, with those same graphics. As you play, would you be seeing the new story, and the new universe, or would you be thinking of the first game you played that you saw these in? People make strong associations to the first encounter with something. It's what's strongest in memory, and anything we associate with that "first" brings back memory of it. When someone plays your game with RTP graphics, they're remembering the first game they played that used them, or their first time using that particular RPG Maker.

