I totally understand that. I used to use about half honestly. Then I got addicted to the heat. I think I got immune and it didn't seem right without the extra peppers after that. I got addicted to the way it burns. To me salsa is fun to eat. Also I used to eat it a lot and my Old man would make it hotter so that I wouldn't eat as much, and it would last longer. That backfired. LoL.
I think it would taste just as awesome even with just 1/2 of a habanero, 1/2 a jalapeno, and 1/2 of a serrano. It would still have the same awesome flavor. The habanero has a smooth heat and flavor. I really like that pepper a lot. The salsa does not have to be about the heat, the flavor is equally important. If it is too hot to enjoy then what would be the point? :)
As much as I like hot though. I tried my hand at growing the Trinidad Scorpion and I met my match there. I could not eat a salsa that I made with even just one of those babies.