Update: Season 17 has come to a close, but Season 18 starts on August 23, so more Seasonal excitement is just around the corner.
After Season 16's Season of Grandeur buff and Season 17's Season of Nightmares , I think it's fair to say that Blizzard has hit on an interesting formula for future Seasonal play in Diablo 3. While some players have complained about Season 17's Legacy of Nightmare bonus being a bit hard to make work -- at least until you have enough Ancient Legendary pieces, anyway -- there's no denying that there's a certain amount of fun to be had in the concept of a special power that the Season bestows on all Seasonal characters.
If you're playing Diablo 3's Season 17 you may have noticed the Legacy of Nightmares set bonus has been adapted into a Seasonal power.
I'm taking it slow and only really playing Diablo 3 Season 17 when both my wife and I can play together, so we're at about Paragon 220 or so and bulldozing Torment 11 or 12, depending on how we feel that day.
Season 18 just started in Diablo 3, but you're probably already rushing your way towards level 70 or beyond.
I personally love when Diablo 3 does a new Season -- it gives me an excuse to create a new alt and/or rebirth one of my current Barbarians.