I don't do savage raids, but what does tickle my neck a little bit to give them a go is the challenge and the glamours. Exclusive phases to savage is also a biggie. Even though I don't feel I am there yet, once I feel like my skill level has plateaued, I won't have much choice other than to go into savage if I wish to improve further; so there's that too. I'll just never be caught up to give relevant savage raids a go if I ever did decide to pursue those hurdles.