As most of you have already stated - there is no "bad quilting habit" just have to find your system.
For myself, I too love making the tops but I have also learned that once I can no longer close the top on the tub I store them in it's time to sandwich and quilt them.
I always start with the smaller ones, getting warmed up for the larger ones and to be honest I've only quilted up to a queen size quilt.
Quilting is my second love, my first is designing and handsewing stuffed animals. So needless to say, I filter lots of animals in between the quilts I make.
If I had to confess to a bad habit, it's the fact that I can leave all my stuff sprawled out in my craft room and when I need to leave it all, I just close the door. I do clean it once a month but in between - boy is my face red and it does explain why I use "Covered in Threads" when signing off on things. ;0)