Well I'm totally with you on the customizing thing, I just think swapping interiors between cars (unless it's something like swapping a Type R motor and interior into your DX Civic, something that's an obvious upgrade) is just kinda weird and pointless. It just seems like one of those things that yeah, you can do it...but should you? It just doesn't really seem like there's any point to it.
Anyways, good luck on whatever you decide to do.