Besides the bride and groom, who looked fabulous, the guests definitely won the prize for "best people/outfit watching" at a wedding. It was nice to be able to gawk at the elaborate costumes without having to be in a smoky bar playing doom music. It's also nice to be able to wear black to a wedding without someone thinking you're making a snide commentary on the probable duration of the marriage.
I've attended a goth wedding once before, many years ago, in which it was obvious that the bride and groom put more care into choosing their outfits, food, and wedding decor than they did in choosing their partners. The groom's cape at that one bordered on the Ren Faire extreme, to the point where a friend of the bride snidely nicknamed him "Super Groom". The goths at that wedding, as you might expect, did not smile.
This wedding had smiling AND laughing goth guests. I think that's a good omen for any marriage.
Good luck, you two. And remember to write thank-you notes for the wedding presents, or you risk some kind of Cursed Antique karma like in that Friday the 13th TV series one of you likes so much.