I don't bother playing roguelikes if I can't use numpad. I'm a perfectionist, if I have to spend 2 turns to cut a corner, when I COULD'VE done it in 1 turn, I can't enjoy the experience! :-) Even considered buying a USB-numpad to use with my laptop.
I was going to suggest Stone Soup Dungeon Crawl too. It's not that it is easy, but it is simple to understand. I too "hated" Nethack (although it was the first roguelike I ever tried, and I WISHED I could understand it, or have the patience to enjoy it, but it felt overwhelming) and once I started finding roguelikes with colored ascii, I never tried nethack again.
Anyway, Stone Soup Dungeon Crawl, and also I can reccomend this game:
http://roguelikefiction.com/ I haven't gotten far in it, but it is simple to understand, simple to learn the controls and pretty intriguing since it's like a novel
Have fun exploring the world of roguelikes