My answer the last time was Season 4 XP Champion. And if I had to absolutely pick a favourite, that's probably the one, because it meant so much to me how many people supported me along the way! And again, the tagline description is freaking amazing! "There is only one Season 4 XP Champion, only one who can bend XP to his will, and he does not share power!" 😁

However, to mix it up, I'll go with Daytime Champion this time!
I just won my 7th @daytime-gaming event today and I have so greatly enjoyed participating in all of them (even when it's a game I don't like as much - except for that awful Gartic on Stream)!
Thanks @dan for putting these on! They've quickly become a highlight of my day!

A couple honourable mentions for taglines that didn't exist the last time this question was asked...
1) Rarefied Gamer - I've loved the DKR time trials in our Rarefied Gamer club. Hopefully as more people get access to the game (especially if Nintendo comes to their senses and puts it on Switch Online), we'll get more participants!
2) Diddy Kong Racer - tagline for the greatest racing game ever made!