Carless Dean will protest the need to walk everywhere! But really, I think he'll end up enjoying it. Until he realizes that he has to do something as mundane as go to the educational center to listen to some tunes. And then he'll start a riot. Complete with demands for a radio station and/or public transportation!
Actually, I also see him finding a miniature model car set in the store that he will then proceed to try and put it together, get pissed off at it's failure to actually look like the car in question, and then proceed to build his own model car from scratch. And if asked, he'll say it's an exact replica of the '67 Chevy Impala, get to talking, and conscript the mechanics in the dome like Winry to help build all the components from scratch and get his car that's not really his car!
But that's a pipe dream. He'll just be content with his model cars. He'll end up with 12 or 15 of them all lined up on the mantel or scattered around the bathroom.
What's one invention/curse/whatever you'd like to see happen in game assuming you still played Anissina?