In one of his speeches, Obama said "Better is good". I think about this a lot. It feels like better compounds over time, too. Small improvements add up. From experience, nothing new is perfect the first go round, so sitting around trying to come up with a perfect design is counterproductive because there's no such thing.
"impediment to action advances action. what stands in the way, becomes the way".
The thing is, "better" is an ambiguous word. I can change a program in some way and make it smaller. I can change it in some other way and make it faster. Both are "better", but in different ways. More often than not, however, you can't have both smaller and faster - or else your are just fixing a performance bug. Often even improving one property makes some other property less good, as you can see in the numerous "pick two" rules.
So "better" means "more specialized" more often that it means "more optimized". I don't say it is a bad thing per se, but it is best to keep in mind that they are two types of improvement, fixes and specializations, because the latter is a commitment.
It's perfectionism.
I always thought perfectionism meant extremely high achievements (for too great of a cost). But it can also be quitting without any progress because you can't accept anything less than perfect (which may or may not be achievable). Perfectionism can be someone procrastinating on a large task.
Obama - what a time to be alive
A saying I've come across is: "Don't let perfect be the enemy of good"
I had a coworker who would always be diplomatic about code changes he felt could be improved but when he felt he was nitpicking, where he would say: It's better than it was. It allowed him to provide criticism while also giving permission to go ahead even if there were minor things that weren't perfect. I strongly endorse this kind of attitude.