Ive never heard of any of those beides Clannad @.@ thanks for this thread though~
I've been watching a lot of Fairy Tail lately ^^ I really enjoy it. It has your usual drama, comedy, and magic all wrapped into one anime. But I have also gotten into Ouran High School Host Club...thats a mouthful x.x Anyway~ as you can already tell its a comedy~ Theres some romance in it, but not as much as Special A or Kaichou Wa Maid-Sama. Both of those are romance comedys that I have enjoyed. Theres also Wallflower, i'm not sure what the japenese name for it is though. But this show is hilarious with this creepy girl that can be rather...disturbing.
If you're more into action theres always Bleach, Naruto, One Piece, Trigun, and Fullmetal Alchemist are some. I don't watch a whole lot of just action though, which sucks really. A few others that I would recomend would be: Mythical Detective Loki Ragnarok, Escaflowne, Inuyasha, Chrono Crusade, Utawarerumono. I'm not sure about the correct spelling on that last one, but I liked it. Escaflowne has a series out and a movie, if youre interested in mecha. Mythical Detective is one of my all-time favorites along with a few others. Its a mystery anime that has a little bit of romance i think.
This is all I can think of at the moment, but if I come up with more I'll post again! ^^