I'm a bit OCD about the back
I try and pass the thread underneath stitches and don't really carry for more than 4 or 5 stitches if I can help it. This is the back of Gazebo which is just pure confetti.
I haven't got Rhyme & Reason with me at the mo, but it's a bit more congested, as it is 2 over 1 full stitches on 25 count, whereas Gazebo is 2 over 1 on 14 count. The extra room makes all the difference. I'm learning to be a little less hung up on the back being a mess though, as with R&R I'd be a nervous wreck if I was striving to make the front a mirror image of the front, but like Rose and so many others have said, it's the front that matters the most.