I'm the same with my girlfriend, we like each other as people and have outsider opinions on each others hobbies and interests. Granted, because we admire each other we move closer and closer in interests and have effects on each other, namely that she's becoming more and more nerdy where as I'm becoming less and less....how would I put it? My opinions are less enslaved to those I read on the internet.
As for wedding, the thing we agree on is we both like medieval times, magic, stories and specifically a Knight-and-Princess romance, so when we discussed ideas of what our possible wedding would be, we thought of more traditional with those things in mind, while still maintaining the modern wedding style.
Candle wax-sealed invitations, hosting in the old part of the city, I'd dress in a military-style suit and she in a longer white gown, maybe a knight and princess on the cake instead of bride and groom and so forth.