I've done very little editing and a few HDRs though the effect isn't very pronounced as it ends up looking too cartoony for my taste. I'll try to experiment more, but the time commitment seems rather steep. I've read through the tutorials in the general FAQ (still waiting for Moglet's to get fleshed out) but if you or anyone else knows of any other tips or tutorials on how to make your photos more realistic, I'd be more than willing to give them a read.
As for the comment about focusing too much on my car...you're right that the last page here has been all about single cars. This wasn't intentional as I do have several wide shots on the first 2 pages, it just seemed to work out that way. I don't actually have any new pictures at the moment, so I'll try to focus more on wide shots when I get back to taking some.