I dont know why, but people always pick favorites, thats like pickin your favorite kid. here are my favorite bands
Led zeppelin
pink floyd
lynyrd skynyrd
the who
the guess who
the doors
gnr
velvet revolver
stp
tenacious d
aerosmith
jimi hendrix
the beatles
billy joel
elton john
bruce springstein
ben folds
moterhead
maroon 5
sister hazel
and many more

you cant just choose one