My Introversion and Extroversion qualities change a lot and no I'm not Bi-polar [Then again I've never gotten tested either LOL]
Anyways I've gotten INTP on the Myrers Briggs Test I took in college about a year ago. Usually score as INTP but things could have changed since then. I do have an extroverted side that over does things a bit
Champions I use: Yorick, Urgot, Darius, Elise, Karthus, Fiddle Sticks, Kassadin, Hecarim, Jarvan, Syndra, and Maokai,
-I like scary looking champions.
-Some may be based around death such as Yorick, Urgot, Hecarim, Karthus, and Fiddle Sticks.
-I loves spiders and was a huge supporter of bringing Priscilla back to the League, so when they released Elise instead I still bought her and loved her style.
-Kassadin is the anti-caster class, similar to my favorite WoW Class, the Death Knight. I play a Death Knight as Tank if that helps.
-Darius, Jarvan, and Syndra all believe strongly in their cause, and have nice abilities.
-Maokai was a tank that I liked out of every other champion labeled as a "tank" so I picked him, his Saplings make me lol, and I make his moves flow W-Q-E.
-I like having options and being strategic in my play-style, and then I love smashing things.
-I like champions that strongly believe in a rightful cause [lore-wise].
-I can never make up my mind whether I like Magic or Attack better than the other.
-Attacking people can be fun at times, but I wished I could be a better tank that takes on all the damage and can actually protect other players.
-Scaring people is fun, I can see it happen when a player's movement starts spazing out or acting strange if I happen to pop up at the right moment.
-It's funny to make players more cautious.
-I like status effects such as slows, or fears.
I'm usually Mid, Jungle, or on Top.