Although stressful at times, and tiring to shoot when it stretches to a 12 hour day, I have always enjoyed shooting weddings! I really love to work with people, especially people who are having a whole lot of fun themselves, and at weddings mostly people are very happy, relaxed and in a great mood.
Being properly prepared ahead of time takes most of the stress out of it, however no matter how well you prepare there are always going to be a few surprises along the way, but if you have done the groundwork ahead of time then you should be able to handle the little niggles that come along a whole lot better.
What has always helped me a lot is building a very good relationship with my clients ahead of time, so that on the day they trust me and don't have to stress themselves worrying about whether I am up to documenting their one off very special event that will (hopefully) never be repeated ever again. Some photographers can't deal with that sort of responsibility and hate to shoot weddings, but it is exactly that aspect that gets me revved up! Bring it on!