#1 Lesson here: Most of my cases were unique and NOT "typical" cases. You should really be prepared for any scenario!
Probably the most interesting was a public sector case where they had to improve internet connectivity for rural towns (native/local populations) in really remote places of the country (think deserts, few roads etc). We had to figure out how to best optimize for this with significant cost considerataions BUT a government mandate to serve the people.
Not a typical case at all :)