I love to throw a lot of stuff in my chili, and this is the best I have ever made. I think it's sweet, savory, and (mildly) spicy at the same time. If you want more heat, double the chili powder, add hot sauce, more cayenne, or use several jalapeños (or do all three, if you're adventurous!) If you can't get your hands on espresso, use a very dark roast and make extra-strong coffee. Sometimes, if I'm feeling lazy, I'll measure out 2TB of cocoa powder, instead of putting in the chocolate. If you like yours a little more soup-y, add some broth.