I have been fortunate to go to two gay weddings. The first was a super cool, laid back affair in Sweden a few years ago. This was probably the most unconventional wedding I've been to. The grooms wore matching shirts and shorts and the reception was in the most gloriously green forest I've ever seen.
At the second wedding the the brides wore none matching white vintage dresses. The day was far more traditional than first, but was also the most romantic and enjoyable weddings I've ever experienced. The sense of friendship and love was overwhelming.