Obviously, there are good and bad gracenotes out there. Angus MacColl? You guessed it - amazing gracenote quality. You, of course, will probably need to practice and develop some knowledge before you will achieve gracenotes that are quite that musical - but hey, that's the fun part, right? Gettin' better!
Consider a gracenote's purpose. It is not a melody note. It's an articulation of a melody note. This points to the idea that we don't want it to interrupt the melody - so it needs to be as short as possible. The bigger a gracenote is, the more it will infringe on the melody - so we have to keep these things SHORT.
I often tell our younger students - don't let a drummer tell you that pipers don't know anything about drumming! In fact, we're piping and drumming at the same time, because our gracenotes create an undoubtedly percussive layer to our music.
It is true - if you go too small with the gracenotes, it may actually become too hard to hear them, so there is a little bit of give and take... but let's face it - at a novice level, the goal is to keep them as small as possible.
See you around Dojo U!