Animes I wish had a better ending:
Trigun (wish it didn't end)
Basilisk (SUCH a SAD ending)
FMA (could've been better)
Gravitation (wish it never ended)
Hellsing (should've put more into the anime)
Chrono Crusade (wish it never ended)
Blood + (wanted a happier ending)
Cowboy Bebop (I didn't want Spike to die!!)
Witchblade (Masane shouldn't have died)
Descendants of Darkness
Gurren Lagann (I didn't want Nia to die and I didn't want Simon to be alone)
I think that's it for me.