It was the popular singles serves until mid 90's. Almost as high as possible so that the shuttlecock fall perpendicularly at the end of baseline. Susi Susanti's serves are one of the most elegant ones.
I'm using the same type of service. I'm much more confident with serving high vs a short service somehow. The trick is to involve your entire body with the swing, almost like a golf swing and indeed hit the shuttle further away from your body. If your service is really high and deep, it's difficult for the opponent as a downwards vertical falling shuttle is harder to time/hit.