The oldest pics I have of our pumpkin torches are from 2010, we've done it every year since at least then. I've found that a roll of TP is great for your average, grocery store sized pumpkin. But our pumpkins are the BIG ones, so that tends to burn out quicker. I'm thinking about getting some cheap paper towels instead. There's also a fine balance between getting the top opening large enough but not too big.
That second pic, the one with no face? That is taken after Halloween, made with a pumpkin that started to rot. The side started to go, so I gave it some assistance with caving in. One of the prettiest because that top ledge made the fire swirl.
You can also buy metallic crystals or flakes that will change the color of the fire. They're meant for campfires or (questionably) fireplaces, but they work fine in a pumpkin.
now with bonus goat man footage, but this shows the size of pumpkin and flame
PS normal warnings for out of accessible guest areas, fire extinguisher of choice, costumes flammable, dry weather, etc. Ours sit on a large piece of plywood (off the grass), behind a fence, with someone always watching and regular check-ins. Wet pumpkin guts help keep the fire in check, but you do have to worry about the flames out the top. It's kind of a pain to deal with, honestly, but it's neat.