One of my favorite ways to get around in Karachi is rickshaws. The only time I get to ride in them though is when I go shopping with my sisters in law. Anytime I go out with Tariq it is always in a car/taxi or on the motorcycle.
Zipping around in a rickshaw is really fun, the drivers usually go very fast and also turn sharply so it can be quite the adventure. The other day I posted about the truck art, rickshaws are also sometimes highly decorated, inside and out. Sometimes vinyl stickers or paint, sometimes bead hangings or colorful cloth. A couple of rickshaws we have rode in have strands of jasmine flowers hanging from the rear view mirror.
A couple little tips though if you have never been in a rickshaw- always negotiate the fare up front, if you don't then some drivers try to overcharge you by a lot. Also if you are pretty tall (Tariq is 5'10" and has trouble fitting comfortably in the regular rickshaws) then try to find a CNG rickshaw, they are a bit larger and so have more headroom.