Heroku.
I don't like setting up servers and things. I know how to (I spent 1.5 years using archlinux and I know a lot on what's going under the hood). I like the functional paradigm where the same input yields the same result. I don't like having side effects although I know they can be necessary.
I would have to create a script to handle the configuration process instead of spending hours redoing it.
That's what I love about Heroku even if it's pricey. Almost no configuration at all. Attach some addons, configure a few env variables and everything else is in the code.