Eh, Ive always found Round Table hit or miss.
There's a local chain near by where each store is named after its location "Baldwin Park Pizza Co" "Hacienda Heights Pizza Co" etc. that makes some of the best pizza around, though its a bit pricey so I dont buy it too often.
Then theres the "3.99 Pizza Co." with two locations near my house that makes some pretty good cheap pizza.
I grew up eating Little Ceasars, so they'll always have a spot in my heart, even if I rarely buy from them.
Dominos was a life saver when I lived in Hacienda Heights, as there were many drunken nights when I got hungry and didnt want to cook and could order 2 medium 2 topping pizzas for $12 and have them delivered in about 20 minutes.