Im the kinda guy, who will ask where the bowl is. Stand up- And it was in my lap, now on the ground. So I look for a nice Tough, Thick bowl. I do like one that looks good and has a Carb or Shotgun.

If I wana get baked I personally use my SteamRoller
( http://www.superpiece.com/photos/steamrollerhpsr1.jpg )

I got one mayby 7-8 inches long and 1-2 inch around. And that thing HITS like a mother fucker. Steam's also arent tooo incredably expensive.

If you got $$$ go with a bong. But that always requires lots of carefullness and water and somtimes a mess.