I love bad and bittersweet endings partly for the dark R18 content but also because they leave a stronger impression and oftentimes make you think. I find that happy endings sometimes feel forced, especially if the LI is a piece of shit.
I'm generally interested in eroge especially if it has some female appeal (side BL or handsome male characters). ones I played so far are Kao no nai Tsuki (very cute male love interest), Reminiscence (BL "bad end"), Natsu no Kusari (voice acted MC), Mugen Kairou (cute trap MC).