The Knight dorm sounds the coolest to me, I'll go with a single bedroom since I like to have some alone time now and then and hate to think that I'm stepping on anyone's toes when I can't sleep or have to go to the bathroom in the middle of the night.
Writing out my curriculum by term
Martial arts 3
Blink 3
Offensive wards 4
Learning how to defend my self and stay alive early seems like a good idea and this gives me a fairly solid kit. Just with these abilities alone I should be fairly formidable since I could set up defensive areas by laying down relatively weak wards then blinking between them and using my martial arts to nail opponents.
Enchanting 6
Jewelcraft 4
A lot of solid utility, not super useful early on however, with a little preparation, lets me drastically increase my magical reserves. This term alone ensures that I'll be able to land a solid job after school and will probably form the core of my build.
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Shielding 6
Animal form 3
Animal talking 1
Shielding is a very useful defensive spell and I imagine will probably be one of the most in demand enchantments around. Animal form/animal talking is an excellent combo to have in my back pocket since for relatively cheap it gives me a ton of options.
Combination 8
Spirit talking 2
Combination is awesome with my enchanting build since it means I can potentially put multiple effects on a single item by combining the spells before hand. It's actually the main reason I took offensive wards instead of defensive wards since I could potentially do really cool things using their reactive 'triggered' nature.
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Healing 8
Nether talking 2
While my career seems to fit Alchemist the most right now my kit's pretty defensively geared, Healing lets me fall back into the defender role should the need arise. With the addition to nether talking I'm not able to potentially interact with ghosts, animals, people and spirits which is also opens up a lot of doors. If nothing else I could always make a decent living as a medium/translator.
Magic 101 2
Survival-ism 1
Lightning 7
Being able to efficiently use mana and quickly restore mana gives me a straight increase to the upper limit of my enchanted items/mana gems plus this gives me a solid offensive option which I lacked before. PLUS this makes it so I qualify for the Battlemage, Wizard, Alchemist and defender classes at the moment which is awesome.
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Hidden library + Study hall - While the connections and experiences I have at this school are great, ultimately I'm going to school with the intention of leaving it someday and the only thing that'll for sure stick with me is everything I learned. With that in mind learning as much as possible is my primary goal for the entire school experience.
Lounge + Slime pet - That being said I'm not a complete robot and having something to break up the monotony of constant study and practice is important for keeping a fresh perspective on things.
Mary, Ventkalo, Kriras, Sil. All seem like my kind of people.
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Ultimately my fighting style would probably rely on making lots of gem's and enchanted objects to assist me and others in fighting. I imagine I'd probably use something like boots enchanted with a blink spell and a spear enchanted with lightning for offense while having mana gems holding various traps that I'd scatter strategically throughout the battlefield.
Some combinations I thought of would be
OTrap + Shield, when someone steps in the area a force field pops up around the area both protecting them and effectively trapping them until it's destroyed or unless they blink out of it.
OTrap + Healing, when someone steps in the area a healing spell is cast on them, good for suddenly healing up team mates.
OTrap + Blink, when someone steps in the area they're blinked to an area designated at the time of placement. I could either use this offensively to teleport enemies into walls or defensively to teleport me or allies to safety.
Lightning + Shield, surround myself with lightning that lashes out at nearby attackers
Lightning + Shield, Attach a relatively weak shield to someone that acts as a lightning rod.
Lightning + Healing, Shoot a bolt of weak weak lightning at someone that invigorates their muscles
Lightning + Healing, channel a bolt of weak lightning through someone that repairs nerve damage.
Enchanting + Jewelcraft, make enchanted magical items with spell trigger effects, I.E. the aforementioned blink boots.