Try Mo Hotta-Mo Betta Sunny Serrano Hot Sauce. My favorite breakfast place has different hot sauces on every table, and I always have to go around to all the tables searching for this one. It's not too hot, but its flavor is very bright and vibrant. It's got a bit of a sweet note to it as well. I absolutely smother my eggs with this stuff every time I eat there.

I like hot sauce a lot as well, but agree with you that flavor and spice are both important. You can't have something so hot that it just overpowers the flavors.

edit: Just realized that amazon says this item is not available. [Here's the manufacturer's website](www.mohotta.com/product/sunny-serrano-hot-sauce/Hot-Sauce) where you can actually buy it.