Being in my line of work, I'm picky about the fire alarm system in a hotel I'm staying in. What brand, what level of detection, does it meet the spacing/height requirements for where devices are supposed to be and how they're supposed to be installed, what company installed it, etc...

But, I know what to look for, most people wouldn't. I do it everywhere I go, not just hotels either. Every building I walk into, I can glance around the room and notice every fire alarm device. I'm also quick to let the the owner/manager know if something doesn't look right.