I am a strobist and often using lights to me is a guessing and trial-error game. Would a light meter take the guessing part out of it?
Depends. When it comes to portrait design and transplanting an idea that is in your head onto film, exposure is completely subjective. You can't meter creativity.
When I shoot babies I like to push the red channel as far as I can to get that soft skin look, as well as reduced blemishes in models. Can't really meter that either. The meter helps me get in the ballpark and reduce the number of chimps, but I still chimp.
However, even in those situations there are times it can be useful, especially the flash to ambient ratio.
When you're shooting commercially and doing shots for something like a company directory or yearbook and you're doing shots at different locations, then it's absolutely essential. You need for your shots to be dead consistent from location to location. Set exposure, set white balance in camera and other than conversion from RAW to JPEG you have no post work. Really handy when you're shooting a couple of thousand shots.




