Brussel sprouts are evil, having said that they are traditional here at Christmas so I cook them, and eat them, and no complain! With the addition of chestnuts and plenty of butter they aren't too bad I suppose. I steam them for about 7 - 10 minutes and then toss them in butter with the prepared chestnuts. I buy them organically from our local farmers market.
I always found them bitter when I was a kid, but I think that's because my dad boiled them for what seemed like weeks before we ate them, but was probably like an hour, not good for any veggie.