Unsigned wrote...
I've heard this anime called Clannad. It's supposedly very good. There's also a season two of it called, Clannad: After Story.
But it's just something I heard...
Clannad is one of the must-watch series, especially the sequel, After Story.
Both seasons of
Code Geass has high entertainment value and lots of wtf's.
Seto no Hanayome (aka My Bride is a Mermaid) is good for light-hilarity.
If you'd like more serious ones,
Monster is a masterpiece
Which Gundam series have you watched? There are like gazilion anime series and spinoffs. I'd recommend
Gundam 00 if that's not the one you haven't watched.
I'd say
Shakugan no Shana and/or
Toradora are good choices to watch (personally, I liked Toradora better). They contain both good stories and great main heroines. They are also great way to get used to the Tsunderes, in my opinion, if you'd want to go to more Tsun-ed animes like
Zero no Tsukaima.
Edit: If you liked Code Geass and prefer darker tone,
Death Note is also great, although it may get you bored, especially during the second half.