I remember being envious of the couples who were together when I first joined the site. Always wondering if me and the wife would ever be able to be just as happy. When you realise how many hoops you have to jump through in order to be together, it is so daunting! Even when you feel confident that you've completed the visa application correctly and can see no reason why the ECO would deny it, you just still can't help worrying! Not a fun time, but as Terpe says, it is the best feeling ever when you realise the application was successful!
I have to admit though, given the 100% success rate here on the forum, I did feel a certain amount of pressure that we'd be letting the side down if the application was unsucessful!