They are my absolute favorites to watch.
They just have this kind of chill vibe about their broadcast.
The LCS is trying its hardest to be stylized like an American Football game.
The LEC has some solid content in games and gives some good feedback on the nature of the game and highlights some questionable choices which makes it entertaining.
The LPL and LCK are reasonably solid games, but no gimmicks because they're basically English translations of foreign broadcasts.
But the OPL is just...chill vibes. And I love to watch the teams--none of the teams I want to see lose and I want them all to do well. It's the only league I can say that of.
LPL/LCK have teams I am indifferent about and teams I like.
LCS has teams I root for and three teams I want to see lose (this year, it's Team Liquid and Flyquest making returns to the list with Evil Geniuses replacing 100 Thieves as the third, since 100 Thieves is among the teams I am rooting for).
Yet everyone on OPL I just...I like them, dangit.
They're the best region in content and I maintain that they're underrated as a competitive region.
I admit--this year their gameplay looks...well, more questionable than it did last year. When I watched them last year I was impressed and thought both teams were playing incredibly well and not making mistakes; this year when watching them I am seeing both teams making tons of mistakes.
But my theory is that difference is due to this being the start of the year and by the end of the year they'll return to the form I saw them in before.