I hate building IKEA furniture, my wife loves building IKEA furniture. Problem solved :).

Same with shopping at IKEA. I know all the shortcuts in our local IKEA so that I can exit the store as quickly as possible.

That sounds like a good match! I learned with an ex partner that I could assemble furniture, or she could assemble furniture, but if we tried it together we'd both get fustrated and snappy.

Easily solved, but surprising considering how well we were otherwise able to act and interact, even in stressful and difficult circumstances.