Like: BWI - Very large airport with multiple food/beverage options. Comfortable places to relax.
MDW - Easy to navigate. OK food options. Lots of power outlets everywhere.
PDX - Reasonable prices, craft beer options, decent food, nice airport.
STL - Lots of good food options (Schlafly!), easy to get around

Detest: LGA - Third-world dump in a terrible location
LAS - Gross, overpriced food, crowds of kettles, no power outlets anywhere, annoying dinging slot machines
BNA - Awful country music playing everywhere, few decent food options
CMH - Just godawful. If it wasn't my home airport, I'd avoid it like the plague.