OP - I am assuming you are a teenage girl/young woman... sorry if I'm wrong. But I am going to play devil's advocate and rewrite your post from the perspective of your brother...
Hi all,
my DF and I began taking annual trips to DW in 2013, problem is that lately I think the magic has began to fade for my big sister. She's at that age (teenager) where all she wants to do is shop and eat at fancy restaurants. My brothers and father and I are interested in riding all the cool rides! Sadly my sister and mother do not share that same interest but at least they tag along and keep the complaining to a minimum.
With our 2018 trip coming up in October, it looks to be the last for a while and I want my big sister to enjoy it fully. Any tips to pry her away from the shops and restaurants to experience more of the parks? I'm perfectly fine with her sticking to the things she enjoys (everybody loves Chef Mickey's) but seeing her get deflated each time someone mentions Splash Mountain makes me feel as though she's maybe not getting the most out of these memories.
I understand where you're coming from. It would be great if everyone in the family loved the same things, or at least happily went along and didn't mope about it. But if he's been to Disney every year since he was a toddler, it's natural for the magic to begin to "fade". I have a 12 year old son. This March will be our third trip to Disney and he has things he can't wait to do, and things he has no interest in. He has ridden Tomorrowland Speedway with his Dad while his little sisters and I met princesses. He has done Agent P missions in Epcot while his little sisters and I ... met princesses.
The girls are over meeting princesses now, but we will still split up sometimes, and I think that's fine.
On the other hand, there are going to be times when he has to do things he doesn't want to. That's just part of being a (relatively large) family. Sometimes he's going to just have to suck it up. You can't worry about helping him make the most of his memories. Let your parents worry about his attitude, and just focus on your own fun.
As for the Halloween party... totally up to him if he wants to dress up. My son would happily dress as a character from Star Wars, but that may not be typical for his age. The party is fun for everyone, though. You don't have to do the "trick or treat trail". You can just hit the stations as you're passing by if the lines don't look too long. You do get a LOT of candy.