Ecchi is a guilty pleasure of mine, and by guilty pleasure I mean it's basically one of the only reasons I read manga or watch anime. Without ecchi, there's no reason to stick to shitty stories since they leave you with nothing.
Other than ecchi, I like to watch critically acclaimed films and series, like GITS or NGE. Anything Satoshi Kon, Ghibli, or Masaaki Yuasa is brilliantly creative and beautiful, but anything middle of the pact is simply not worth watching unless it's really interesting. You'd be better off watching things like Re:Zero or Danmachi simply for the conversations you can have with people, nothing profound.