The age old mf-er: going into something out of sincere love and passion vs. utilitiarianism (aka 7 buzzkilling words -_-: "Does it put bread on the table?").It has it's facets like realizing the stuff you didn't expect etc and is more complicated.This seems much less significant when I cant put it with the big thing I wrote b4.
There's also intelligence vs. emotional maturity (which imo might be used 2 synmously blend in and out with the so called "emtional intelligence").Example I guess?:You can have a Ph.D in nanotech but you bicker with someone over a camera they broke of yours years ago,I guess.