DOTA 2 is my primary time waster, have over 3000+ hours on it. It's endlessly entertaining, because there is so much variability in the games. You have 4-8 spells depending on the hero, with 6 active item slots, which means once your team has leveled up, team fights can be a burst of seconds, or a 5+ minute long affair, with each tank employing different survival strategies to block damage, heal, or escape, just to heal and get right back in it. There are multiple different game modes, but are a little challenging to find and play. Still, it is the one game I play with the steepest learning curve. I don't think I saw myself as "good at the game" until I was around 1000 hours in 😶‍

Smite is the only other game I have 1000+ hours in. I started playing it as a break from DOTA 2, and as a way to connect with my little brother. It's a lot like DOTA 2, but far more simplistic. Each god has 4 spells, with no active items. Instead of left-clicking for movement on a map, you use WASD to maneuver your god. It's fun, and you can pick it up after like 30 hours. The different game modes are a lot easier to navigate than in DOTA, but it's also a lot less engaging. The updates and quests are all very simplistic. I was going to try out the new Smite 2, but after watching some game play, it looks... exactly the same as Smite 1.