Yuletide Writer, you are the best! I hope you are pleased with your assignment (and if you are horrified, I'm so sorry!), and are filled with ideas for what you want to do. Here are some hints to help you out!
General likes: I like sturdy characterization and genuine humour and warm affection and touches of angst and, you know. Smutty goodness is fine, but totally not necessary. I really love it when people are fond of each other, even while they are driving each other crazy. I'm perfectly happy with either AU or canon-compliant stories. Happy ending, please!
General dislikes: I'm not really into hardcore kink, or non-con, or humiliation, or drug use. I wouldn't like for any of the requested characters to die, I guess. I'm not a big fan of cheating in committed relationships (unattached sluttiness is fine). I'm pretty easy, and can probably be made to like almost anything, if it's done well.
More specifically related to fandom:
MacDonald Hall - Gordon Korman
Bruno and Boots forever! I love them when they are boyfriends, and I love them when they are platonic life partners, and I love them I love them I love them.
I'm really a big fan of the OTPness of Bruno&Boots, whether in a romantic sense or just in a best friends forever sense, so anything that explores that would be lovely, even/especially in the midst of the hysteria that generally surrounds the two of them. I'm keen on any time frame, whether it's their very first meeting or years after the Hall has passed into happy memory. And, of course, I love all of the other assorted usual characters, if you'd like to work them in as well. Yay!
Terminator
I would like something hopeful. Fix-it fic for Terminator Salvation, or set earlier during the movie's timeline, or whatever you want, really, just... hopeful. If you want to make them friends, or give them a protective sibling-type relationship, or a romantic one, it's all good with me.
I like the sort of found family idea that Terminator Salvation was kind of working towards (maybe) with Marcus and Kyle and Star, these three people who don't have anyone else but each other, and how their different pasts and experiences influence how they try and take care of each other. And maybe how that goes when they try and integrate into a larger group, or what happens when things aren't so dire and every second isn't life-or-death. I don't know.
Practical Magic
Owens women! I would love something witchy and magical and impish and fun. Tell me about their hair!
Okay, you don't have to tell me about their hair (but OMG, if you want to, please do!). I just really love this movie, and the sisters and the aunts and the house and the garden and the generations. I don't have anything specific in mind at all, I'm so sorry!
Drake and Josh
Drake and Josh forever! Future fic would be lovely, but in-series is also great. Something light and fun/crazy in the spirit of Drake and Josh would be amazing (but a touch of angst is also fine). Again, romantic pairing or best brothas are both awesome.
Drake and Josh, so ridiculous! I love them both, but Drake is really my favourite. Pretty much anything would be awesome. Up to their usual ridiculousness, or something more serious. You can't go wrong with hurt/comfort (especially if Drake is the one who's hurt). Megan is great in small doses, and I love Walter.
In conclusion, optional details are optional! Anything I've said here is just a suggestion, please feel free to go your own way. I really am quite easy to please. I hope you have fun!!