I pick Tyrande because she is a better written character compared to that flip flopper elf. She saved Azeroth two times instead of trying to erase it by conspiring with Death or trying to capture potential allies(Eyir comes to mind) for egotistical reasons. The third reason is that I find Sylvannas and her fanbase with all due respect lame. Oh look at me how cruel life or death is. I must erase everything to bring justice. Boring and lame.