Seems like most people here are working on fiddle tunes or alternate music.
I have done the fiddle tune thing myself but find that it is not all that popular for my bands performances so out of two sets we may only use two fiddle tunes or less. So we mostly do bluegrassy type stuff -sometimes with songs adapted from other genres.
Would be interested in hearing about others are developing their ability to put together breaks to random songs.
For me most of my practice is playing along with my 160 Gibson Brothers songs. Learning to play all around the neck and all the various double stops then added in some cross picking. I just don’t seem to have enough speed to play anything impressively and so keep hoping I can make up for that with good taste but have trouble finding nice little licks and fills