Depends.

If it's a game where people have told me it's good I will continue to reserve my judgment until I'm done with it. I like to be able to understand why people call it good even if I disagree myself.

If it's a game I picked up myself without hearing any positive second opinions I'll be prone to dropping it much more quickly. Even if I don't plan on dropping it, the lack of a second opinion I trust means that I really need good motivation to continue and as soon as that goes unfulfilled I just won't pick it back up. This also happens if I get outright bored with a game. Doesn't happen often, but nothing kills motivation more than that.

That said, since I almost exclusively pick the games I play based on recommendation and good reputation I have rarely encountered the latter case. Whenever it's a game or VN people talk passionately about, I commit to finishing it in its entirety. I've been witness to too many instances where the last 2-3 hours of game time completely changed everything.