Im new to anime!

Depends what genre you are into.... There's a 'best' for each type of genre/category :) Let me know what you like....

detective conan imo

a better way would be to use mal.
http://myanimelist.net/topanime.php

Gintama' seems to be the top of the charts.

my list of completed anime that scored 10

1 Edit - More Saki 10 TV 25
2 Edit - More Detective Conan Movie 09: Strategy Above the Depths 10 Movie 1
3 Edit - More Hikaru no Go 10 TV 75
4 Edit - More Detective Conan Movie 06: The Phantom of Baker Street 10 Movie 1
5 Edit - More Planetes 10 TV 26
6 Edit - More Detective Conan Movie 01: The Timed Skyscraper 10 Movie 1
7 Edit - More Hatsukoi Limited 10 TV 12
8 Edit - More Love Hina 10 TV 24
9 Edit - More K-On!! 10 TV 26
10 Edit - More K-On!: Live House! 10 Special 1
11 Edit - More Hajime no Ippo 10 TV 75
12 Edit - More Mai-HiME 10 TV 26
13 Edit - More Detective Conan Movie 08: Magician of the Silver Sky 10 Movie 1
14 Edit - More School Rumble 10 TV 26
15 Edit - More Detective Conan Movie 04: Captured in Her Eyes 10 Movie 1
16 Edit - More Detective Conan Movie 05: Countdown to Heaven 10 Movie 1
17 Edit - More Detective Conan Movie 15: Quarter of Silence 10 Movie 1
18 Edit - More K-On! 10 TV 13

I second Gintama - popular (though I haven't seen it) Stenis;Gate - is very good and will have everything.

WOAH! cool thanx winnie! lol wait i gotta take this all in my brain hehe THANX BANNIE, i might sign up to MAL!

there's Skip Beat, Kimi no Todoke, Blue Seed, The Vision of Escaflowne, Chobits, Durarara!!, Fruits Basket, Fullmetal Alchemist and Hakuouki Shinsengumi Kitan

i've seen pokemon, naruto (a few eps), bleach (a few eps) and conan (also a few eps)

wait im gonna check out skip beat