I am enjoying all of these series but Monster is amazing.
If it wasn't for Death Note, it would literally be my all time favorite.
I also adore Serial Experiments Lain, as I love psychological series and Paranoia Agent is great too.
Hakuōki is making its way up to my favorite reverse harem spot, aside from Ouran Highschool Host Club, and Sola is lovely as well.

I dont know what any of these anime series

@yanglight09- They are not the most popular but each are really good. :)

I have been wanting to watch Sola for a long time because it sounds really good. Is it sad though?

@Dewheart- It does get sad towards the latter half of the series but I think it is worth it. It's a lovely series. :)

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Definitely~

@pumpkinqueen and EmoSauSaku- It really is a beautiful series, from plot and characters to the OST and animation. :)

I haven't seen any of the others, but Serial Experiments Lain and Monster look interesting. I watched the first episode of Paranoia Agent a couple days ago and it looks promising.

This is the only one iv seen, really loved it! :)

@perryperry- Both are really good if you like serious psychological series. Paranoia Agent is also really good and it can even be funny at times,

@rikku_chan- It is a really different series, and how it is still relevant to human interaction with the Internet now is really impressive.

I love things like that! And I've watched more of Paranoia Agent too, it's great.

@perryperry- I do too. Paranoia Agent is great and it makes you think.