We enjoy spicy food and prefer ethnic restaurants that lean towards more traditional spice levels, which is often hotter than even we can tolerate, LOL. On a personal scale of 1 to 10 chile peppers, American-mild would be 3 or below. American-medium (often adulterated with sugar, which mutes chile heat) runs 4 to 5. A true Asian/Latin medium would be 6 to 7; true hot would be 8 to 9. 10 is for those few who eat chile peppers whole!
Spouse likes spicer food than I do, so he's easily 6-9. I'm in the 5-8 bracket.
We like blends of different chiles. Much more complexity and nuance using compatible varieties.
Sadly, the Asian and SE Asian restaurants here have become distressingly sugar-oriented. A lot of the younger 'foodies' are extremely sugar-addicted and don't realize it. They want cocktails with sugar syrups and the sauces/dips sickeningly sweet. We went to a fav Thai place last night which had a new cook, and the yellow curry dipping sauce with the roti was sweeter than a dessert sauce...ugh!