Frasier
Buffy
X files
Melrose
La law

Cop Rock is #1, definitely!
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Okay, maybe not

Party of Five
Friends
Dawson's Creek
The Simpsons
My password is password.

Fiends
Beverly Hills 90210
Kenan & Kel
C Bear & Jamal
Soldier, Soldier

Twin Peaks
The X Files
Buffy

Sledge Hammer! … that was from the 90’’s, no?

Top 3
The X-Files
Buffy the Vampire Slayer
Batman: The Animated Series
Honorable Mentions
:
Tales from the Crypt
Married with Children

Boy Meets World
Sex and the City
Buffy the Vampire Slayer
Friends
We don't talk about Bruno! No, no, no!

Gawd, lemme think.. I'm just gonna go with childhood shows which I think all aired in the 90s. Don't shoot me if they aren't. Idc when they were made.
Sabrina
Sister sister
Kenan and kel
The sdcret world of alex mack
Are you afraid of the dark
Ermmm.. wisbone
Round the twist
Hey arnold
Rugrats
Wild thornberries
Two of a kind
Arthur
Doug
Cow and chicken
Pinky and the brain
Ed, edd, and eddy
Rocko's modern life
Catdog
Sabrina the animated series
Tom and jerry
Some animated variation of addams family.
Pingu
Blue's clues
Mona the vampireeeee
Ahhh real monsters
Barbar
Clarissa explains it all
Angry beavers
Ren and stimpy
The amanda show
Fort boyard (with melinda messenger)
The fairly odd parents
Basically anything that was on nickelodeon, cartoon network or bbc.
Tracy beaker! How could I forget that! I'm sure there are more I am forgetting.

Freaks and geeks
My so called life
That 70's show
Boy meets world
Daria

The X Files
Sister Sister
Rugrats
Friends
Two Of A Kind

Full House
Roseanne
Beverly Hills 90210
Melrose Place

I was a huge Aaron Spelling fan so:
Beverly Hills 90210
Melrose Place
Savannah
Models Inc.
Robin's Hoods
University Hospital

I love the following.
saved by the bell
Buffy the Vampire Slayer
The X Files
Clarissa Explains It All
Beverly Hills, 90210
Sabrina the teenage witch
Hercules: The Legendary Journeys
Dawson's creek
Friends

Friends
.
Sailor Moon
and
Boy Meets World
deserve honorable mentions.

The Simpsons
Friends
Seinfeld
The X-files
BH 90210 (early '90s)
Freaks and Geeks
Fresh Prince of Bel Air

Martin
Living Single
All That
Secret World of Alex Mack
Hey Arnold
Rugrats
New York Undercover
21 Hope Street
Between Brothers
Sister sister
Are You Afraid of The Dark
Kenan & Kel
In Living Color
Family Matters
Beverly Hills 90210
My So Called Life

In no particular order mine are,
The X-Files
Adventures of Brisco County Jr
Bottom
Friends
I liked Relic Hunter but it was by no means a favourite of mine.

These were the shows that I had watched in the 90s, and some of them I still do.
Sailor Moon
Martin
Living Single
New York Undercover
Moesha
Clueless
Rugrats
Doug
Rocko's Modern Life
Sister Sister
Ren and Stimpy
Hey Arnold!
Blue's Clues
All that
Arthur
The Powerpuff Girls
The Huggabug Club
Magic School Bus
Little Bear
Tiny Toon Adventures
Timon and pumbaa
Talespin
Captain Planet
Darkwing Duck
Goof Troop
Babysitter's Club
The torkelsons
Flash Forward
The Little Mermaid
Aladdin
Wild N Crazy Kids
Global Guts
Princess Gwenevere and the Jewel riders
Busy World of Richard Scary
Maisy
Allegra's window
Gullah Gullah Island
Don't play games with a girl who can play better.

The X-Files!

"Grace & Favour"
"The Adventures of Sonic the Hedgehog"
"The Adventures of Pete and Pete"
"Rocko's Modern Life"
"Clarissa Explains It All"
But there's a lot of series that very much belong to the 1990s, but started earlier (such as "Saved by the Bell" and "Married with Children").
Poof! There Goes Perspiration!