I wasn't a 90s baby, I was born in 87 but the 90s was the decade I grew up in so...
Backstreet Boys or NSYNC:
Seriously? Just No.
Favorite Spice Girl:
Ginger Spice
Britney Spears or Christina Aguilera:
At the time Britney Spears, but now Christina Aguilera by a country mile...
Warheads or Ring Pops:
Warheads!
Beanie Babies or Tamagotchi:
Tamagotchi
Scented Markers or Gel Pens:
Gel Pens
Pokemon Cards or Yugioh:
Pokémon, narutrally...
Power Rangers or Ninja Turtles:
Power Rangers
Air Bud or Space Jam:
Never seen either, but I guess Space Jam
Snap bands or Scrunchies:
I'm a guy, so neither! 
Nickolodeon or Cartoon Network:
Nickelodeon
Favorite Pokemon:
Haunter or Pikachu
90s TV Cartoon:
Hey Arnold!
90s Movie:
The Matrix
90s Musician:
Kurt Cobain
90s Song:
Nirvana - Come As You Are
90s Toy:
Gameboy, as above! 
90s Book:
Harry Potter and the Prisoner of Azkaban
Who was your 90s celebrity crush?
Jennifer Aniston or Sarah Michelle Gellar
Did you crimp your hair?
No
How many pokemon/yugioh/digimon cards did you have?
I can't remember, not a huge amount
Which card was your prized posession?
Shiny Charizard (I surreptitiously got it by trading a Shiny Venusaur & Ł5 note 
)
Which 90s trend would you like to come back?
I'm not sure what you call them but I had a Quicksilver clip that went on your jeans onto your wallet.
What kind of posters were on your wall?
None! 
Did you make cootie catchers?
Yes