Torchlight II
I may return to this godforsaken desert eventually, but it's wholly dependent upon getting people together. For all the mechanical and technical ways in which Torchlight II betters its Goliath of a rival, it still can't rival Diablo III's intensity and bombast. And while on paper, TL2's replayability dwarfs Blizzard's depressingly-anemic endgame, after enough levels it starts to feel samey and unengaging.
Except with a party, of course. And even though Runic hasn't done a perfect job in regard to multiplayer - latency can make the game a nightmare, some network configurations induce an invisible player limit, and the game browser could use more focus on finding your friends - it certainly puts Battle.net to shame.
Better than: Torchlight, Diablo II
Not as good as: Diablo III, Borderlands 2
Still worth it though: if you're addicted to the genre, or have a team to play with.
Progress: Gave Up -- Somewhere in the desert