im a really spicy person, so probably a 10. I actually grow all the peppers I consume, some of which are Carolina Reaper, Trinidad Scorpion, Bhut Jolokia (ghost pepper), and Fatal Gourmet Jigsaw. I grow allot more varieties than these 4 but they are my spiciest peppers. im currently trying for a Spanish Naga Plant but its rather difficult to locate one.
For clarification I only grow Bhut Jolokia peppers to sell as I find them to be rather tasteless while the other peppers listed are full of flavor. Most people eat Ghost peppers only because they believe it to be the hottest pepper and to show off to others. I will highly recommend Trinidad Scorpions over them as they are much more flavorful with the same relative spiciness (depending on how you grow them, as they can be much hotter if grown in ideal conditions)
level 1- A apple 0 SHU (Scoville heat units)
level 2- A Bell Pepper 0 shu
level 3- Taco Sauce unknown
level 4- Siracha ~2200 SHU
level 5- Hot Salsa unknown
level 6- jalepeno ~1000-20,000 SHU depending on specific pepper
level 7- habenero ~100,000-350,000 SHU depending on specific pepper
level 8- ghost pepper ~855000-1000000 SHU
level 9- carolina reaper ~1,400,000-2,200,000 SHU
level 10 - Satan's soul Assumned as concentrate of the spiciest edible chemical (Resiniferatoxin) 16,000,000,000 SHU