I think i love jelly rolls, haven't had enough to really know yet.
So far i made a jelly roll race and an irish chain. For the jelly roll race i had bright batiks so i added some black batiks just for contrast and breaking things up a little bit. For the irish chain i had to add a dark solid and a light background to make it work. The jelly roll for the irish chain was very bland even though the fabrics were all busy.
I think i am going to make my own jelly rolls out of scraps to have on hand for those times when i need to quick projects.
A jelly roll will certainly make things go faster and you won't have to use much brain power. I love that you don't have to always think so hard so you can make something very quick and have instant satisfaction in between larger or more complicated projects.