Dungeon Crawl Stone Soup and Cataclysm: Dark Days Ahead — the absolute best roguelikes around. -- The first has a very focused philosophy of removing all tedious and spoilery game mechanics, optimal strategies and no-brainers from the game. Some hate that, I love it. DCSS is the anti-Nethack. You can play online on your browser, with graphical tiles, spectators and even information bots for all your queries. https://…
Just try playing it as a Doppleganger Monk.