Preseason is the most fun I've had on this game in a while.
I felt like season 5, despite being more diverse, was always which new thing had been buffed too much. We had the cinderhulk meta, devourer meta, tank meta; you name it.
Finally, after all that, we get some new masteries that allow me to actually change the masteries to fit what I want to do on a champion. For example, I did an all healing build Trundle (which is nuts on Trundle btw), and a Thunderlord decree spam build on Ryze (45% cdr ftw!).
I've most definitely had way more fun on this preseason patch than a lot of the last season all together.
Plus some of my favorite characters are now more playable again with the new masteries backing them up.
For example, the deathfire mastery makes bursty AP champions still really strong and good at extended laning, but doesn't make their burst stronger. On ADC's warlords is basically frenzy from the old tree, but the flat damage increases they get aren't actually as high. For tanks we finally have actual tanky masteries that make big impacts (all of the resolve key stones are nuts), but that don't give them big damage for building tanky stats.
Good times, good times.
Preseason OP.