Too many to quote, To summarize this,
Yes i boosted GB with a friend of mine for few days got bored with it, Then to invasion, I boosted maybe 20 games i don't remember it got boring for me again so i never boosted,
As for load of TL kills i was boosting custom challenges, Went from Half way Noble to Eclipse and stopped there.
And, CS Burchie is right, I'm deaf and i play pretty well.
I've tried MLG, And Arena, The reasons why i don't play those playlists often is cuz i keep getting disconnected from Arena, MLG search time was too long for me.