I recommend atleast considering a uromastyx if you're looking for a SUPER friendly, easy to manage big warm lizard.
I have two of them and I honestly could not be happier with my choice in picking them.
They eat basically all fruits and vegetables (my mom cuts and dices a wide variety of fruits and veggies and spoils my lizards so bad), and crickets also but only about once per month.
I hand feed my big uromastyx pieces of banana all the time, he absolutely loves it.
I have them out of their cage running around my room for about 15 minutes almost everyday, they're really pretty lazy and slow (well not slow like a turtle, but slow as in very easy to catch with your hands whenever you need to).
Here's some pics of my two uromastyx, sorry for the crappy camera quality :/
http://i26.tinypic.com/efgzt0.jpghttp://i43.tinypic.com/254zdrp.jpgGive them some consideration if you're looking for big friendly lizards!