For me the base line is the build up. It can be shorter or longer, have a compelling story or just some lighthearted context, a straight line or multiple paths, adorn it with whatever flavors you like, and so on. But no matter what, if there's no buildup whatsoever I'll drop it without second thought. And anything that detriments that base line makes the experience exponentialy worse: early cheap sex scenes with secondary characters that adds nothing to the build up, peeping or dream sequences to see the characters nude or having sex (throwing the excitement for that first moment to happen out the window), straight up chicks jumping at MC's cock as soon as they lay eyes on him, etc.
So naturally, I like slow paced games. Although there are some games that take it too far even for me (or simply stretch it out without really building up anything at all), and also there's some quick-ish paced games where there's enough buildup to work out.