It seems you've figured them out, but I'll pots this in case anyone else is confused.
IMHO = In My Honest Opinion
LMAO = Laughing My A** Off
YAGMCB = "You're a Good Man, Charlie Brown"
POTO = "Phantom of the Opera"
TLFY = "The Last Five Years"
SFANW = "Songs for a New World"
LSOH = "Little Shop of Horrors"
TMM = "Thoroughly Modern Millie"
WT = "Wonderful Town"
I starred in a short film called
Magnetic Personality. Check it out!