Suggest an anime

I'm sure this thread is inevitable, and I'm looking for a new one to watch anyway, so what anime would you suggest. Suggest only one anime per genre, that way we know that only the best will be suggested.

I'd suggest Sword Art Online for action, and High School DXD for harem.

For Psychological I'd suggest Phantom: Requiem for the Phantom, and Chrome Shelled Regios for Post-apocalyptic.

I'm not a huge steam punk fan, but Desert Punk was really funny.

Those are my suggestions, what about you?

I think you should watch The Melancholy of Haruhi Suzumiya. It's a great mix of Sci-fi elements and Slice of Life, and I personally really enjoyed it. (Especially the movie)

i suggest watching black cat for action it has a good plot and stuff like that

well I'll give you some I personally enjoyed and you can determine wheter or not you do to, can't really give you advice for you since I don't really know what you like so here goes... warning there might be many so keep up :p
Attack on titan
Hunter x Hunter 2011
katekyo hitman reborn, went from gag to action so first part isn't as good, just stick with it
accel world, similar to SAO
D gray man
Eyeshield 21 nice sports anime
Magi
Ao no exorcist
Guilty crown
Mirai Nikki psychological horror
Bakuman gives a great insight on how manga comes to pass
Hajime No Ippo another great sports anime
K anime
High school of the dead, a lot of fanservice and pretty nice action
shakugan no shana
soul eater, art is a bit shaky but story wise it's fantastic
Death note... duh
Kenichi the mightiest disciple
campione is pretty fun
yu yu hakusho old but gold
aquarion and aquarion evol nice mecha anime
code geass
great teacher onizuka
hellsing ultimate
deadman wonderland
shaman king old but gold again :p
Tengen Toppa Gurren Lagann simple battle manga no real thinkers just plain out fighting, pretty good though
fate zero
durara
blood +
devil survivor 2 the animation pretty great
claymore
black lagoon

Well... these should get you started :p

Well recently, I watched an anime called Argento Soma. It's basically a small romance filled with alien technology and war, and can be quite confusing if you miss even a single bit of important information, but all in all I'd give it a 8.5 out of 10. I'm currently watching one known as Blassreiter. Think of this as technology like demons that can control human technology, such as cars, bombs, etc., and put them against what's known as a Blassreiter, or a human who can do basically the same thing thanks to a drug. I've only watched a few episodes, so I can't give an accurate rating as of now. For now we'll give it a 7 out of 10

i recently watched this anime called Air gear check that out its definitely worth it.all i know for now is that its about a futuristic xtreme sport

kind of kiddush but naruto is great but take the longest to finish and 2 gens if you get hooked and ghost hunters

Try Captain Tsubasa its a very old anime but a real good one if your into soccer.

Ok ive recently seen this anime called Psycho Pass,
The story is based on a time where a system is able to measure a person's mental state,personality and possibility on committing crimes by using cybernetic scans on the brain.Give it a try, im sure you'll like it as much as i did.

Shingeki No Kyojin for action
Sekirei for harem
Hetalia for comedy
K-on/Lucky Star for slice of life
Cat soup for mind screw (this is a one-shot anime)