Many of the animes I'm planning to check out for myself! Right now I'm watching Gangsta, Gintama and Youjouhan Shinwa Takei from the ones you mentioned. Gintama is the funniest and one of the most unusual mangas out there. Not sure if it's your taste though. It's kind of a dirty series, and not only meant in the perverted way XD But yeah, I love Gintama. It's breath of fresh air in my eyes. Youjouhan Shinwa Takei... *sigh* While the story is teally interesting, they talk so FAST. It's so hard to keep up with the sub @_@ Gangsta's concept overall is interesting, but the anime feels a bit dull and lifeless as an adaptation. I'll prob read the manga afterwards.
I won't list them all, it would take too long, lol.
But some are: Silver Spoon, Youjouhan Shinwa Taikei, Kimi ni Todoke, Gangsta, Shigatsu wa Kimi no Uso (been meaning to watch it since it came out, never got around to it), Nabari no Ou, Kyoukai no Kanata, Chihayafuru, Toradora, Skull Man, Princess Tutu (I've heard it supposed to be really good and not as cutesy as it sounds, so I'm going to try it), Mousou Dairinin, Jigoku Shoujo, Samurai Champloo... and it goes on.
I'll probably try Gintama and Hunter x Hunter sometime, since everyone says such good things about them, but they're both so long I don't know when I'll get around to those.
Those are just some of the ones I haven't seen at all yet, not counting anything I'm currently watching. Right now I'm almost finished with Mawaru Penguindrum, and it's definitely as crazy as it sounds but at the same time I'm ridiculously entertained.
Ok, now let me just tell you this about HunterxHunter: It's one of the best animes I've ever seen and one of my favorite if not the favorite shounen series. Best consistent animation for any longrunning shonen I've ever seen, and best bromance! I caught up with it over the summer, and in a way it changed my entire perspective about the shounen genre. If you ever start it, tell me, b/c I'd liked to discuss. It is by no means a perfect anime as it has a slow start, unfitting music in certain scenes, and creates polarizing opinions on the heavy use of narration during the Chimera Ant, but it still sets a high bar in terms of longrunning adaptations. It's pretty much on par with Fullmetal Alchemist Brotherhood
