I went with 3th. I just thought #3 Dark would just be hilarious. I have absolutely no justification for that, though. --- FC's: B1: Lexi 2365-9525-1918; B2: Misaki 4213-1809-7119 3DS FC: Thomas 5069-4431-9392 Last seen off in my own little world.
Dark type in Japan is "sinister" type and gym leaders are supposed to be honest trainers who test aspiring trainers, so I wouldn't be surprised if we never get one, but I think it should be the first just because it would be a fair advantage to whatever type you have. 8th gym as dark type will be too easy. --- The Boondocks on Adult Swim is my favorite anime.