This was a no-brainer for me. Spoiler: Rannoch Priority Mission I really liked Legion but the Geth have been a pain in the ass for years and even in ME3 they STILL turned on me despite saving them in the previous game. On the other hand I never met a Quarian I didn't like. So Geth go bye-bye for me. Sorry for Legion though, who has an equally sad death as Tali does (if you choose to side with the Geth).