Do you guys usually plan every step of your trips or go with the flow??

I confess I love to be surprised by things like when I was in Rome and I had no idea of where things were and just started walking around and then I make a turn and BAM, there was the Colosseum!!! It was such a nice surprise!! Of course I knew I was gonna find the Colosseum in Rome but I wasn’t expecting it right there and then! It was such a magic moment 

But in the other hand, I’ve missed a few nice experiences simply because I didn’t research