Try mixing 3 parts regular ketchup with one part sriracha sauce.
Try 1 part ketchup and 9 parts something hotter and spicier than sriracha sauce.
I like sriracha sauce but it doesn't have much of a kick for me. Flavor's good though.
I'm like a drug addict who needs more and more of the drug before I can get high.
I need real hot, Hot, HOT sauce before I can burn my taste buds.
What can I say? I've been an hot addict my whole life.
:-)