ADOM is one of the best actual Roguelike games out there. Flexible combat, lots of enemies that are there to kill you, and lots, and lots of deaths to be had. If you manage to beat ADOM in the true Roguelike mode, that's a true gaming achievement, that not many people can claim they have achieved. The modernized UI and Graphics combined with tutorial mode and Custom game option make the game more accessible for those who just want to play RPG with nearly infinite depth, and provides a hardcore challenge for those who think Dark Souls is a cakewalk. If you are going to get only one actual Roguelike into your gaming library, ADOM is one the titles you should consider.
I have played Avernums 2-5,, and I liked those games a lot. Large area to explore with lots of cool stuff to find, and and best of all, basically you can fully customize your group in the beginning, with few races and many traits to choose from. Combat works well, and quests have some variation. Well worth the price.
