teen guy doesn`t know what to do with hair, maybe grow it long?

Hey everyone!!!! I am really hoping for alot of feedback as I don`t know what to do. I am a 16 year old teen guy who hasn`t ever really stayed with the same hairstyle for a long consecutive period of time. At one point in my life I had an undercut with the top part down to my shoulders (I would sometimes wear it in a high ponytail). Later, I tried the style where it is combed forward/faded and is flicked in the front. I`ve had a sort of brushed back short spike thing for a while. I have also had a completely shaven head not too long ago! Anyway, as I`m sure you can tell, I get bored quick. Right now, I have a flat-top type look that is maybe just a little bit longer than an inch on top and maybe a little less than a quater of an inch on the sides and back. I got the this because I wanted to try it and I have. I like it, but have an urge to change my style. My hair is dark brownish on the verge on light black (if that makes any sense) straight as a needle and I guess might be considered a little thick. Any and all suggestions on what I should do are greatly appreciated. I was thinking about letting my hair grow long, but maybe this time instead of having a long undercut, I might let it all grow. Or should I get an undercut again? I was thinking what it would be like to have curly/wavy hair the other day. What should I do? Is there a style I haven`t tried yet that someone suggests? Or should I try a new variation of one I have had already? Help me please???!!!!

P.S. I am somewhat tall (about 5`10" or so) and am very thin for my age/height (only about 135, give or take). I also have a somewhat longish face and dark olive skin. Don`t know if any if this makes a difference. Thank you.

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