I have about 6 different flashes and right now , non are in camera bag .
I shoot weddings as a friend / guest shooter . Granted a few shots have unwanted shadows .
After way to many hours playing with flashes , reading books , and even posting questions , the flashes sit in their own bag and are seldom used . Right now I would say software is easier to learn and use than learning flash . Without flash , what you see is what you get most of time . With a flash , glasses , secroms , earrings braces , red eye , all kinds of items show up that you can't see when you take shot .
If you think you need a flash , invest in LED lights / light panels . The ones I use have rechargeable batteries cost me 19 something each , worked great and I bought 4 more [ total of 6 ] Since then , they have come out with ones that are bigger and batteries last longer .
Before you decide , buy a used copy Speedliters hand book by Syl Arena . Don't waste money on a new copy , if you like it , then buy a new copy .
Hopefully others will post about LED lights , if no one does - post which LED light is best ?
never ming , I will post question .