Path of Exile
An ARPG that respects your time by giving you a passive tree the size of a galaxy.
GGG keeps adding mechanics faster than I can learn them, and somehow it mostly works. The build depth is unmatched in the genre — a passive tree, gem links, ascendancies, and cluster jewels mean two characters of the same class can play nothing alike.
Currency-based trade is still rough, but the league treadmill keeps pulling me back every few resets.