Winning a pro tournament with a team that I've grinded with.
I've played league of legends on and off for 9 years and found my roles that I excelled in. I grew aware of lane roles and responsibilities later but was able to hone in on nuances and tactics due to my experience. All in all, my main role is support but I do adc and top as well. I like the aspect of communication in ranked games so if you plan on taking it seriously communication is key.