I don't watch the pro league for my region, because Oceania sucks ass. I do occasionally watch Korea or China though. I miss the bromance between Peanut and Faker. I started rooting for SKT in 2013, so that's still part of my connection to League, even though they've definitely dropped in quality since the good ol' days
Used to avidly watch the pro scene when C9 and TSM were the leading teams (2013 when C9 had its comeuppance was a hype year holy). Now I kind of just watch to see when NA will ever do well at worlds lol.
I've never been too much into it. All I do is watch Worlds every year, some matches here and there throughout the year, and that's about it. I miss the good old SKT, though.