In competitive battling there are 6 main tiers. There is LC(Little Cup), NU(Neverused), RU(Rarelyused), UU(Underused), OU(Overused), and Ubers. Each use specific Pokemon that have been assigned to a tier. Which is your favorite tier in competitive battling?
90% of the time I play with OUs, sometimes UUs. I haven't played with Pokemon of any other tier unless I'm playing casually with some friends and I feel like using some of my favourite Pokemon that are in the other tiers.
I mostly play OU or NU. I'll occasionally play UU when the occasional tournament is struggling for participants. My NU team is most successful so I guess that's my best tier overall, but I'm renovating my team and it's not going too well.