Season 2. Had actual ears as Telltale fell into the too short category when it came to them beforehand. Plus a better bat symbol and overall look to it really. The Season 1 prototype is a close second though. It's basically Batfleck, but with an actual balanced build.
Season 1 main suit. I don't like the bat symbol on the prototype suit, the mark 2 is two metallic and armor-y, and the season 2 suit reminds a lot of Injustice Batman, which I also don't like.