Hi. Another big Maiden fan here. Thought that from your username you were either fan of the boys, or maybe a girl into more medieval stuff!
Anyway welcome and yes, I share your views on a lot of that stuff, especially the "death growls" --- absolutely hate those, and will refuse to listen to a band whose singer uses them. Pity, as I'm sure otherwise I could be listening to some damn good metal --- Opeth, Dimmu Borgir, Haggard etc --- but like you, if I can't make out what the guy is singing, what's the point?