Ang mga sumusunod ay pawang mga opinyon ko lamang.
To make the fill tasty, we need to go back to basics.
BASIC GUIDELINES
1.Place the Fills Properly-
Play the fill before the chorus, between two choruses, after the chorus, and sometimes, between 2 stanzas. Don't overplay between stanzas para hindi harsh pakinggan. Use either short or long fill before chorus, use short and simple fills after choruses and between stanzas; use power fills/licks between two choruses for dramatic effect.
2.Use Proper Fills-
Simple lang, rock fills for rock music; mellow fills for mellow music; etc... ibagay lang yung fill sa type ng music.
3.Use Variety of Fills-
Mas exciting sigurong pakinggan ang song pag iba iba ang fill kesa ung iisang fill lang ang ginagamit sa lahat ng song...para hindi boring pakinggan. You may right down all your fills sa music book para maipon at "magkapondo".
4.Make it Expressive-
Drum fills can actually express emotions.. They can make the song sound dramatic and powerful; and bring the music down to "normal" level. Try putting a character to your fill, as well as to the song. It can be "mabangis", "mabagsik", "malupit", "killer fill", "unpredictable", etc..etc.. bahala ka na sa term.. The character/expression of the fill depends on how you create its sound.
5. Be Creative-
Experiment. Try manipulating the notes or the pattern, reverse the sticking (right left right),create your own combos and licks..and apply some concepts of composing fills.
6.Avoid Guessing-
Mas safe siguro kung sure ka sa gagawin mong fill during gigs para iwas mistake.
7.Never Overplay-
A song doesn't always require licks, and power fills. Remember your dynamics. Pwedeng panay simpleng fills lang in some cases. Avoid playing fills every after 2 measures para malinis pakinggan. And one thing more, the drummer is not only the musician in a band. Give way to other musicians to show off their stuffs.
I hope the guidelines could help.