With the parks constantly changing and adding new attractions, it can be a stretch to get everything you want done within the space of two weeks. I went last year in a big family group. Never will I go in a big group again because there are just too many arguments and it's impossible to do everything that everyone wants to do. In the end we ended up splitting up and doing different things each day. It's very important to make an itinary, plan what parks you want to do on which days, that way you can plan in the odd rest day. Obviously you know this Welsh as you've been three times before. Obviously you've got the Universal Parks and Busch Gardens for your major thrill rides. Then you've got the Disney Parks where you can't really go wrong because there's something for everyone.You said you wanted to ease your brother's girlfriend in to the parks. Well Magic Kingdom would be a fantastic place to start, nothing exceptionally thrilling there, just lots of fun. In fact Magic Kingdom is a great way to kick off the entire holiday, couldn't think of any other way to do it. The view you get whilst walking down mainstreet... you know you're in for a special holiday. It sounds pathetic but I actually teared up last year, it was that overwhelming, and I've been before!The Disney and Sea World parks are obviously much more varied than some of the other parks because there is more to do than just rides. In fact Sea World, Animal Kingdom and Epcot only have 3 major rides, yet you can easily fill a day there. I could personally spend two days just exploring the World Showcase at Epcot, it's just simply wonderful, plenty of shows, entertainment, restaurants and little surprises just begging to be explored. Love it. Staff are great at Epcot too.If I had to choose I would pick one of the Disney waterparks (Blizard Beach is lush) and skip Aquatica for another day at a park or simply just lounging about wherever you're staying. It's good to just lounge about for an odd day.Okay I will stop talking now, I could actually go on rambling about Orlando for pages and pages but don't want to bore anyone. If you wanna chat more Welsh then just drop me a message