I guess it just depends on what you like. I think straight diagonal lines could look pretty nice. What kind of thread are you using? Do you want your fmq to shine? or blend in? Echo quilting a log cabin could be a lot of work. How much time do you want to put into it? Lots of large loops all over might also be a fun look. And would be quick. Are you doing quilt as you go? Tying might also be an option.....
Anyway, kudos for you.....you are extra special to be contributing your work that way.