Im still longing for a Season 2 of Claymore, an epic anime least to say imo.
Dunno if it's been discussed, but missing Neon Genesis Evangelion in the list (the ending is a bit fucked up though!), also Love Hina, damn I loved that series in my younger days
Also, a maybe not to well known anime you should see, from what I remember it was good atleast, is Guyver.