I'm a big fan of less tread the better.
Specifically, tires with micro street tread like Panaracer T-Servs of Continental Contact is all the tire i need.
Have tried many a semi-knobbie, cross and aggressively treaded tires out in the tuft over the years, and IMO slick tires are very adhesive in almost every condition save slick mud, super steep or wet root days - and even then, not that much of an disadvantage over the slight extra grip tread provides.
Last edited by Bekologist; 06-05-13 at 08:46 PM.