I've really gotten back into Hearthstone, recently.
I stopped playing around the time that Knights of the Frozen Throne came out, which was in August 2017, and I haven't touched the game, since. Since then, i've missed 14 expansions, 10 of which have since rotated out of the standard format - ie, they are now irrelevant.
So, I logged in with 4 expansions to catch up on, with Castle Nathria (the most recent) having just launched a couple of days ago. Thankfully, I was greeted by a few "Welcome back" quests, to the tune of a few thousand gold, and also around 12000 arcane dust, to craft whatever I wanted.
I first dove into the (relatively) new roguelike Mercenaries mode, which is reasonably fun, though from my experience, it isn't particularly deep. Its a decent distraction, though. Definitely a bit of a grind.
I then played more than a few Tavern Brawl matches, which were, and continue to be, a lot of fun. Its just goofy spins on the normal rulesets, that change every week - last week's gave you a deck full of random murlocs, and this week's, instead of drawing a card from your deck each turn, you instead choose one of three randomly picked ones. Nothing serious, but definitely enjoyable.
I have now since decided to spend all of my gold and dust, and I crafted a couple of meta decks using some guides online. One that I have gotten a lot of mileage out of so far, is a Mech Mage deck, which focuses on Mech cards, and their various synergies - which is effectively amounts to a lot of card draw, and a hilarious amount of random damage.
Its fun, and im really glad that there is a mobile version, so I can play it just about anywhere.