Oh yeah they worth it if they're made from good materials (100% cotton not only on the tag) and not just simple picture of a band took in the wood or in the castle
i like shirts with a picture of the cd cover/logo on one condition IF THE COVER/LOGO IS REALY GREAT some kind of art etc. the most i hate Cannibal Corpse covers/shirts, and all this stuff with skulls and the Iron Maiden (trying to be scary)
my favored are, Opeth, Anathema, Therion (secret of the runes and the last two) Children of Bodom, Gathering polish bands Vader, Behemoth and two which you probably don't know Riverside and Abyss, i can name more bands but i think you'll be bored enough
i don't have many of its just Anathema ? Serenades but it's not girlie so i don't wear it often, one Sepultura, Chaos A.D. long slave blouse it has about 10 years and it's worn-out so i use it only to clean up the house
I've made three shirts by myself one with Anathema logo (embroidered) second - Crying Angel (printed on special paper and ironed) and Opeth logo (painted) Why? Simply because i haven't found an original ones in any shop and i wanted to have my favored band-shirts And one more reason None Has The Same Looking Shirt
Or i don't know maybe I'm childish