I can eat habaneros. Unfortunately, somewhere between my mouth and my colon those habaneros turn into napalm. Needless to say, I eat them sparingly.
I can eat Jalapeno peppers on sandwiches but I haven't tried anything hotter.
Habaneros are easily tolerated for me.
I remember having this one pepper that was cultivated by an Indian gentleman in my Oregonian hometown with his own genetic selections. He called it "Parbu´s inferno" (eponymously named) and it was a small, thin red pepper with many seeds. That was without doubt the hottest pepper I´ve ever eaten. Two of those little red devils and I was dizzy and sweating like a slave.