I don't like them (boring, and I play Piano, what the hell am I gonna do?)
I do, however, respect that people enjoy them, and there's a serious market for the stuff.
What I can't stand is people who belive that becasue they aced so-and-so on Rock Hero or Guitar Band or whatever you younglings play, that puts them on a par with me or my brother or anyone else who plays a proper instrument. I don't deny that people can have fun on these games without learning an instrument, and it takes some skill to play the hard songs very well
But PLEASE, when I recount my performance of "In the Mood", or my brother does a guitar solo, or my mate plays "Toccata and Fugue in D Minor" or me and my mates do a Barbershop song, DON'T think you can act like an equal. 100% Through Fire and Flames is admirable, but it's not musical, go away