When I'm on vacation with my family, I need to get away. I get really cranky if I don't. Don't get me wrong; I love my family, but I need at least an hour to myself every day to be alone with my own thoughts (or at least an hour where no one talks to me). So in January, I'll wander a gift shop by myself or go back in the evenings for a sit in the hot tub (well, generally my dad goes with me, but that's our time to BOTH be alone with our own thoughts). Or sometimes I'll just say, "Hey, you're going to ride this? Well, I feel like riding this. See you in an hour."
In August during the two week trip, I get away with being alone more. I get down to the pool whenever I darn well please, and then I go back before the rest of my group (which works out because I need longer to shower since my hair is longer) and then I'll walk into Epcot by myself (I have gotten some very strange looks from Cast Members, lol), go to the arcade for a while if we're at BLT, wander a gift shop, whatever. I spend a lot of my August trip by myself, and this suits my family and me just fine. Last year I spent an entire day at Typhoon Lagoon just by myself. My mom wanted me to go with her, but I said, "I've been with you for two weeks now. I need a day to myself." She laughed and agreed and went off with her other friend.
I think this August I'm probably going to take my brother and we'll go to Disney Quest for a while. Which works out because we barely talk to each other anyway except for deciding what we're doing next. It'll be the first trip where I'm 18, so my parents said as long as I don't spend the entire vacation away from them (especially since next January I won't go with them, I'll go early and take a friend) I can pretty much do as I please. Which basically means I'll say, "I'm not going to the pool; I'm going to Studios, see you later." Might take my brother. He doesn't want me talking to him anyway
