My favorite place to get a pizza with my buddies is Bazbeau Pizza in Broadripple.  I always knew that their pizza was very good and extremely popular with my friends but I recently learned just how popular Bazbeau's is.  I was flying back to Indy and picked up a magazine that was ranking the best places to get a pizza in large cities and Bazbeau Pizza was first on the list!  I highly recommend the BBQ or the Hawaiian, those two are my favorites but I'm sure you can't go wrong.  You have a ton of different choices since their menu is so big.  Bazbeau Pizza is the best restaurant for pizza in Indy, bar-none.