Saikou no Jinsei no Owarikata ~Ending Planner~ - I think it might be the one, although it's somewhat sad by definition and there are many emotions involved (especially in first episode), I'd said it's a very calming, reflective drama that gives positive perspective on life and what's beyond.
If you want something really quirky I recommend some of Ueno Juri's works:
Ueno Juri to Itsutsu no Kaban
Turtles Swim Faster Than Expected -both are extremely weird, philosophical and "I don't know what I'm watching but it's interesting" type of thing.
If you want some romance without craziness and drama:
Maybe
First Kiss - it sometimes has a bit of intensity, but its not too dramatic, there aren't many annoying people, and main lead (or rather romance interest is a nice guy)
Or
"Pride" -it's a wonderful lovestory without the usual cliches and dramatizing.