I really can't choose my favs, so I'll put 3 tracks as my favs for each album.
Madonna: Lucky Star, Burning Up. Physical Attraction
Like a Virgin: Love Don't Live Here Anymore, Into the Groove, Pretender
True Blue: White Heat, Papa Don't Preach, Open Your Heart
Like a Prayer: Like a Prayer, Keep It Together, Spanish Eyes
Erotica: Deeper and Deeper, Erotica, Rain
Bedtime Stories: Sanctuary, Bedtime Story, Human