Alrighty... the sad part is how much of this I actually have memorized. Seeing as I don't actually know what the choices are in TS3, I'll just elaborate on some of the stuff and you can make an educated guess. Technically, I'm giving you their last names (sans Chris) but Japan is strange like that.:
Douche-Kun (Saeki if you want to use that.)
Above-average derptard through hard work and not natural talent. I don't think I can type up what his deal is in under 500 words so I won't bother <3
He doesn't specify his favorite food but he does go on about liking to tackle spicy foods for the challenge. He's a coffee freak so camp him next to a coffee or espresso machine until he dies of a heart attack.
Likes blue (lighter blues such as sky blue namely).
He'll tolerate any music but prefers the mellower stuff like classical guitar.
He wants to run a cafe but I suppose any type of management will suffice. Technically he wants to be a barista but fuck him anyway; he's never gonna get his dream. <3
Cancer (kinda funny since in the Sims 1 and 2, Cancer was the well-rounded type)
Shiba
He's oddly mellow, but in a good way. He should be either dozing off or running laps around the house training. <3 When in doubt, deem him the gentle giant and call it a day.
You never do get a clear answer out of him about foods he likes but just pick something big and hearty.
Likes black.
Likes rock, jazz... and new age. Takes all types I guess.
He's the sports guy of the game so something relating to athletics (baseball preferably)
Scorpio
Hikami
Probably the most critical guy of the lot here. Don't get me wrong he's nice as hell but he's also pretty no-nonsense. Straight-laced and eccentric as hell. Can't into social situations.
Find the mildest food on the list--he might be able to handle that. Doesn't like meat but isn't a vegetarian.
Likes white.
Likes classical music and nature sounds. Dislikes rock. This means you should have the fancy stereo in his room with heavy metal going nonstop.
He should have his face crammed into books or a telescope's lens at all times. Loves astronomy and science. He should be abducted by aliens for the lulz.
Libra
Chris
Don't leave him unattended. He'll vandalize the house in the name of creativity and art. Arguably the nicest guy and getting him angry is a crime against nature. He's definitely got an upper-class upbringing.
He doesn't actually mention what foods he likes but pick something healthy if possible.
Likes green.
Likes classical music and piano. A bit of jazz too.
I'm sure HE'D like something art-related but he has some [forced] background in business management. Sucks being torn between family obligations and what you want to do. Take that as you will.
Pisces (same birthday as me too)
Amachi
If Douche is Mario, Amachi is Luigi. Above average (in most cases) but pretty quirky. He sucks at art.
Eats anything and everything but loves desserts, cake, etc.
Likes gray (substitute with purple if they don't have that).
Likes anything but hip-hop, jazz, and classical. I suppose pop or rock music is more up his alley.
Unless there's a lifetime dream of ice skating or synchronized swimming, I haven't a clue what he'd want. He is hilariously girly though. Pick something suiting for a girly guy who wants to do what he wants without being ridiculed. Otherwise, maybe a party nut since he enjoys being popular (unlike Douche).
If anyone is to be playing video games, it's him.
Gemini
Waka or Wakaouji if you want his full name.
Because there is no such thing as too many quirky people. He acts pretty scatterbrained and was likely taken in and raised by a herd of cats.
Something simple like rice and fish, with emphasis on simple. Stuff cats would like.
Likes pink.... Don't ask. He's a bit out there.
Likes oldies music. Park him next to a karaoke machine for lulzy chaos.
Waka got burnt hard by the scientific community when they valued profit over findings--I won't elaborate further. He genuinely likes to teach but he also wants to relive the youth he never really had--oops, spoilers... uh, he may be the party animal of the group here.
Hm, he's really good at darts. DID I MENTION HE LOVES CATS?
Virgo
I shall elaborate more if needed. <3