Would you be more intrigued if a girl you just slept with left immediately after sex? Or would you become more attached if she stayed and cuddle after sex?
To be honest it depends on what she wants and the vibe I got from being with her earlier. If she's one who doesn't want to stay, that's how she is. If she's one to want to stay and cuddle, that too is how she is.
I don't think I'd ever want the first option. I'd always prefer she stay the night after sex unless it was already agreed upon she wasn't then I'd still want cuddles.