How can you possibly choose, lol?! They're ALL amazing. Ed definitely got my love in this time period--he became one of my favorites. Al was as amazingly cute as ever, his sacrificing was so touching and brilliant.
And Roy, well, Roy has been one of my personal favorites for a long time, so he automatically is awesome. The way he handled his part of the sacrifice was amazing.
Hohenheim and Izumi were badass as usual, I especially loved the "at least I can give my sons something cool to see" (somewhere along those lines) and the "hubby! -knocks over Roy as passing him by to reach Sig-".
So really, all were my favorites.