I echo your sentiments. I felt that it was the music service that put its users' experience before all other concerns (which surely lead to its legal issues). When there was a song I wanted to listen to, I came back to it time and time again, rebuffing Spotify and its ilk.
Same here. I was an early adopter and they maintained early adopter pricing until the end. I think I joined in 2009. I lived in 3 different countries and 5 different cities since then, and my playlists on Grooveshark were one of the few constants. I resisted using any other phone besides Android because of the app (which wasn't even on the app store) and only moved to an iPhone after they had been shut down.