I honestly started reading this and thought it was going to be about the guys that do a lot to show genuine feeling or show that they care about a woman they're interested in.
For this, I'd simply say look at the direction of their focus. If they are constantly saying "Look at me" with their actions but in the way of "You should choose me because look at how awesome I am," they're trying to convince themselves that they are worth it. Ironically that makes them unworthy.
However, if a man is saying "Look at me" through the lens of "You should choose me because I've chosen you and this is how much I'm willing to do to show you how invested I am in you," then they are showing you they are confident in themselves and their value and they just want to show it to you in a more comprehensive way. Some guys just try too hard in the wrong ways. If it comes from a place of genuineness though, I personally don't believe there is such thing as trying too hard. There are definitely levels to it and one can go overboard due to a personal insecurity, but genuine guys who aren't insecure will let you know how they feel about you with their actions rather than their words.