The idea that Love is some sort of "battle" and that you must win it is the antithesis of what love is.
Take a puppy dog: he/she loves you, is always eager to display that. Do people reject the dog because it is too "easy"? No.
In my experience, having lived in San Francisco for 30 years, there were the guys who were emotionally available and showed they liked you (of course, this was back in the '70s, when guys were more open about their emotions than it seems they are now), or there were the guys who had what I call "the issue": I like you, but I don't want you to like me back, because then I'll have to respond and I don't want you to know this, but I'm very insecure inside, and I think that any guy who likes me must have something wrong with him." Since I understand this thinking because of my work in mental health, I don't stay around to try to break thru someone's defense system (that's all that it is, there's nothing else. People are so afraid of the relationship ending up with them getting rejected, they are focused on that, and not the building of the relationship itself).
I met quite a few guys, and found that when they were growing up, the family environment was on, shall we say, the "cool side." Meaning, no open affection, or "I love your" from mom - or dad. Mine was the opposite. My father came into the bedroom and hugged and kissed my sisters, and my brother and me every night until I was 15. So, intimacy is not an issue for me (I do have other ch allenges, but not to do with relationships) and when I like a guy, I act like it.
I feel sorry for the guy who is put off that someone likes him. I can understand the alarm one could feel at a declaration of love on the first date, but other than that, I find the more secure one is inside, the less he plays emotional games (passive/aggressive, or that book where the two women wrote how to "catch" a guy. I've never experienced genuine love as something that requires play-acting. Nor do I believe it exists). Except maybe on Facebook.
So, given enough time - 3 dates or so - one usually has a feeling if this should continue (and not just because the sex is great, because that's a trap: if sex is great, lets face it, its easy to become hooked if you are a very sexual person and sex is No. 1 on your list (it's No. 4 on mine, after Communication, Affectionateness, Attentiveness). I learned in San Francisco that the guys who put sex in first place usually didn't pay attention to the red flags they should have noticed, such as the guy is only warm before sex, and cold afterwards, or doesn't pay attention to you, or want to know your history: your family, childhood, what you wanted to be when you grew up.
Arbitrary list? Not really. A person who is interested in you is no different than someone who is a Star Wars fan: what they love, they want to know EVERYTHING about, no matter how small the detail. They LOVE anything to do with Star Wars. I'd say who'd want someone who doesn't pay them that degree of attention, but people who play games have trust issues. And if you cannot trust, You cannot Love. They go together. Some will disagree, but they're quite mistaken. Ask any great philosopher, or read Kahlil Gibran's "The Prophet." He has a beautiful section about love truly meaning LOVE, and it is a giving - not a taking - thing. You give it because you have it to give, he says, and to Love is "sufficient unto itself." Meaning, you get high off the love YOU feel: you don't usually need someone to love you back for you to love them. You just do. So, if you run into these guys, tactfully suggest therapy. You'll be doing them a favor.