Must-see shows?

Syfi - Battlestar Galactica
Comedy - Frasier, Will & Grace, The Office, Everybody Loves Raymond, & The Big Bang Theory
Drama - Grey's Anatomy, House M.D, CSI: Crime Scene Investigation, Fringe, NCIS, Skins(Uk)
Action - Spartacus: Blood and Sand

it depends on your definition of must see, there are some shows taht have been wildly popular and depending on the person just dont like to watch it.
if tu are looking for a mostrar that has been wildly popular and tu wanna watch there are tons:
NCIS
all 3 CSIs
Heroes
lost
24
the office
30 rock
Mad men
etc.
i could name más but yeah thats the point

if tu are looking about mostrar recommendation..
hmm.. kinda hard cause tu seem to be all over the place.
If tu like crime: watch criminal minds
amor and drama in a high sch: gossip girl
comedy: The big bang theory and modern family (espically modern family)

so this recommended shows are just based on my opinion and what i can gather from the shows tu watch that i know about.
as for the popular shows, thats just what i gathered from rating and news.. ;D

I don't watch a whole lot of shows now a days. However, there are a few awesome ones I love; some no longer airing. But the ones I recommend would be:
Buffy the Vampire Slayer
Battlestar Galactica (2003)
Monk
Psych
Will & Grace
NCIS
I would say TBBT too, but I saw your last comentario that tu usually watch it but didn't add it.
If tu have Netflix, Buffy, BSG, Psych and Monk are all instant streaming.

The Vampire Diaries
Glee
Desperate Housewives
Gossip Girl
One árbol Hill
How I Met Your Mother
Hannah Montana (I know, right?) :)
H20 sirenas


Idk...I think that's all I know and watched.

The Bill
Glee
Eastenders
inicial and Away
Horrid Henry
Coronation Street
Friends
The Return of Tracy Beaker
WWE
TNA Impact
Skins
Waterloo Road
Match Of The Day
Sportscene
The Walking Dead
Recess
Thats So Raven
Britannia High
Tarzan
Wayne Rooneys calle Striker
An audience with..
Emmerdale
and much more..

i personally love;
Gossip Girl
Charmed
The OC
90210 (don't start with watching that, watch it if tu are bored xD.)
Merlin
Pretty Little Liars
What i like about you

- and some shows tu already have seen d;

theres alot

Charmed
Buffy the vampire slayer
Angel
Criminal Minds
Pretty Little Liars
Friends
Gilmore Girls
8 simple Rules
2 and a half Men
Breakout Kings
The Nanny
Family Guy