Back door dilemma

Today, the back door is finally dry from the last coat of stain. I am really glad I did the third coat because the finish feels really smooth and looks good. Now my dilemma - do I do a 4th coat? It's pretty good now, but another coat would make it really nice. But, it is good enough now and the doors will need to be restained every 1-2 years so maybe I should wait? It would be really nice to be done with at least one door - I've been looking at blue tape on all the doors for weeks. Also, since this is a double door, doing a coat of stain is a big project and it may not be worth it.... but then again it may be.