Well I don't have anything except for shows that I would LOVE to have more episodes/seasons made.
Full Metal Panic: there's still a bunch of light novels, enough for at least a season if not more.
School Rumble: The manga ended recently (I think), so they could do a proper ending, and not a cop-out like season "3" was.
Panty & Stocking with Garterbelt: with the ending that got, it could easily get another season.
BTW just in case, there is no plural version of Anime.
If you want to talk about multiple anime, you say anime series or shows.
Toho's Godzilla Will Live Forever!