Thoroughly rinse all the beans under cold water then put them a 6-quart slow cooker.
Add the water, tomatoes, onion, garlic, paprika, cumin, oregano, cayenne, 1 tsp salt, and ¼ tsp pepper to the slow cooker and stir until well combined.
Place the lid on the slow cooker and cook on LOW heat for 8 hours.
Take the lid off the slow cooker. Stir the chili and continue to cook without the lid, stirring occasionally and mashing up the beans a little bit, until chili thickens, about 45 minutes.
Taste the chili and season with additional salt & pepper if necessary.
Ladle chili into bowls and top with cheese, avocado, and jalapeno.
