In most cases, interpersonal skills are way more valuable than something abstract like "intelligence".
The ability to effectively communicate (verbally/non-verbally), actively listen, relate/empathize to/with others, mediate/resolve conflicts, delegate responsibility, take direction, respectfully disagree, etc. are unbelievably important. From cultivating quality relationships, to kicking ass at work...people skills are the shit; as cliche as it may be to say so.
I'm not trying to imply that IQ is completely worthless, but the truth is, very few jobs actually demand a lot of raw "processing" power. I'd say IQ comes into play most crucially when talking about aptitude in learning procedure and policies— someone with a high IQ is going to generally catch on to things much faster. This is true pretty much across the board. Whether we're talking about learning how to flip a burger at Mickey D's, or learning to master a difficult pastry recipe, having a leg up in terms of intelligence is certainly going to help.
On another note, having too high an IQ or being too smart (or appearing to be, anyways) , can really be a negative. People tend to be threatened and alienated by people that they perceive to be significantly smarter than them.
