League of Legends (LoL) Question: is aatrox worth to buy ?

Wait for his rework, then decide if it is worth to buy him.

He is going to be reworked pretty soon

https://www.youtube.com/watch?v=s8p_brCVNOA&feature=youtu.be

Yep!

Aatrox just got reworked. You can test the new Aatrox on the PBE client right now.

Good thing is that his design is pretty cool, and looks pretty strong as well. But he's basically another Riven now, he's purely burst/combo based, he's no longer a melee autoattacker. So see if you like this playstyle.

Well, with the new rework, I would definitely take an interest in him. He was already kind of cool but just not really good at what he was supposed to do. Even so, I enjoyed playing him.

I find that its stupid to listen to general ideas on what is good or not purely based on meta and raw stats ect.
At the current MRR I am in (roughly between silver 2 and 4) I can beat alot of matchups that I on paper should not.
I play alot of Sion and kicked Fiora players ***es quite hard.

You should use the free champ rotation to check what champions you are generally good at pick one you like the most and develop better micro skills by constantly playing that champ.

Dont look TOO much to others for champions that may be cool fun or strong to play but try to find something that fits your playstyle.