I want old school/hardcore crpg principles with a modern interface:

challenging quests/combat/puzzles
choices with consequences
interesting complex character/party design
interesting stories/conversations/memorable NPCs
many factions with different rivalling goals
possibilities of world interaction/manipulation
death traps, hopeless game situations, fear
turn based combat with chess like possibilities (many moves, resistances, attacks, weapons …)

For me the essence of crpg gaming is:

Using his own intellect to form and steer a party so it can survive and succeed in a challenging interesting interactive fantasy world.