I've always tried to stay away from metal picks, was that a bad idea?
It's all personal taste, try them, if you like them use them, if you don't then find something else that works.
Brian May uses an old sixpence coins & Billy Gibbons uses Mexican pesos (they don't have serrations apparently).
I also had an unreasionable liking for the sharkfin picks in the 80s, but for the most part stick with the Dunlop Orange totrex these days.
Way back in time Clapton used to serrate the edge of his picks a little to get more attack, and apparently Dave Gilmour plays so hard he totally shreds a tortex pick within 2 songs.
As they say YMMV
Rob...
Edited becasue my spelling is absolutely cr@p !