The goal is to have a meaningful personality and interests.
If you're thinking of a transactional "If I do this then women will like this" you've already lost.
I know people that play D&D on weekends or do inscrutable things like try to write a textbook on biothermodynamics and they have meaningful relationships. It just means they have a unique personality and healthy interests and thus are a rounded person. All in all, it just means you are interesting. If you spend your free time, even an hour or so a weekend on brewing beer or just growing plants on your windowsill it shows that you have a degree of independence and thought that someone else doesn't have and thus makes you different.
If you are trying to find a gf or a meaningful partner then it's attractive if you have your shit together, can spend time with them, but also have your own healthy interests. An unhealthy interest of playing Destiny, LoL, or tabletop games for 10 hours a day, being unwashed, lazy and distant isn't attractive; and for some reason a vast majority of incels cannot comprehend this. Even if you were a millionaire and spent the majority of your time online, being unmotivated to do anything, and incapable of a conversation because you have no outside interests, you would never find a meaningful relationship with a woman. Reference: Elliot Rodger
I met my significant other online, and my inane hobbies were (when not doing experiments in lab) trying to grow a variety of exotic fruit trees (goddamnit I tried to grow pawpaw trees so many times) on my balcony, film photography, and working on a novel no one will ever see in my spare time. I'm not particularly good at any of the things, but I can talk in an impassioned way about scarification and what I would need for a dark room. My significant other does not care about kaffir lime trees or the mediocre pictures I have taken with kodak ektar 100, but me talking about that and being interested in those things is much better than some dipshit who only wants to fuck you and watch netflix afterwards because that's all they can do.