I always use guides too. These days I don't have as much free time as I used to, so I'd rather spend my time reading the story than replaying sections because I picked the wrong choices.
I also like experiencing the routes in the recommended order, especially in games where certain routes contain major plot reveals or spoilers. Using a guide helps me get the intended experience and makes it easier to focus on the story itself.
That said, when I was younger, I used to play without guides sometimes and just pick whatever answers felt right. It could be fun, but it was also frustrating when I ended up on a bad ending after hours of reading