There's a lot to be said for contentment; that doesn't mean one has reached the maximum and cannot/should not work towards improvement though, it's about being happy in each moment, content with what one has done with it, which brings less chance for regret, and I think that's what helps make life feel more fulfilled.
We all have things we want to do, like Antarctica for instance, and if they're important enough they'll happen, although finding happiness and contentment generally, even through simple things, is one of the elements that make up a good life, for me at least. Many small enjoyable moments are preferable to holding out for the big ones that may not occur very often.
Thanks for taking the time to read and comment.