One thing that really shortens my time searching for a RealTrack style is realizing that the styles were recorded at a relevant tempo and if I use a style that is too far away from the tempo of my song it just doesn't sound right due to audio stretching magic inside the program. Searching only styles that are close to my song tempo eliminates the ones that simply won't work for me.
With midi styles this doesn't seem to matter as much but using a midi style intended for fast songs doesn't really work for a slow songs anyhow, for example.

Does the noise in your head bother me ?