Chibi art always is a good time, having it in UI elements that don't need full art is almost always a good call (Loading screens, tip screens, emoticons, etc), but I'd welcome it wherever it showed up. I'll be the first to say "Huniepop" 1&2 actually pull off the dating side of the game really well, obviously the more modern elements would need a fantasy coat of paint if you were to take inspiration from them. Also "PMC promiscuity" is still in development but has nailed the dialogue. I have yet to finish it but am enjoying the simplicity of the progression.