Never had the Pizza Mia at Pizza Hut. I always get the stuffed crust pizza or the P-Zone. Both are quite good. I dunno if it's just me, but I never really liked the pepperoni. Always had a burnt taste...
I like Little Caesars! If you are a poor college student *points to self*, it's an excellent way to eat-out cheap, and you will have leftovers for your next meal! Two meals for $5 is quite cost efficient!
Some have said that Little Caesars taste horrible, and some have said it's awesome! I have been to 3 different ones in my area (well, an hour or more away from me), and I must say that it really does vary with the place. The one I go to now taste amazing, but the first two I went to tasted horrendous!!