Nah. Everyone who shows up here is a little off :lol
Build what you like, do runs if you want. If not, you still have some awesome pieces in your collection. It's a win/win.
Yes, there are a billion Iron Man threads, and sonic screwdriver threads, and a billion other threads as well. Everyone has their own interest.
Personally, mine vary so much over time that my collection is a little on the crazy side. It started out Star Wars, went to Superman, Batman, comic related, Brisco County Jr, Indiana Jones, back to Superman, and has had a few Anime pieces roll in, and now it's heading into the occult area.
The whole point of the hobby is to have fun. I don't make crap on the runs I do. The pieces may go for a good amount, but that's because they COST a good amount to get made. Grinding down a 2" rod of aluminum rod into an angel blade is not something someone does for a few dollars.
Enjoy yourself first. Worry about the "business" aspect of the hobby as a distant second. You will be a happier person.
Chris