Don't really watch anime, never really have... but harem is evil. You throw a boring-as-fuck male into a room full of archetypes that either hate him or love him from the off, and there'll inevitably be an incident where he slips and touches one of their, ahem, breasts, and then they'll freak out and kick the shit out of him. Otherwise it is a dull girl surrounded by gag-worthy men who glisten a lot.
This formula makes me depressed.
Ecchi is rubbish. I don't even want to think about how horrible hentai is. But good lord! I am surprised that everyone is a despiser of mechas! Mecha shows kick arse. They give me shivers.
Romance is bad. Genuinely bad. Leave it to people with imagination, or at the very least experience!