I wouldn't find this successful at all. Not reaching for more, not finding new goals to accomplish and experiences to enjoy... I would find that to be a failure, because then you've stopped moving and closed your eyes to what the world has to offer you. But, as others have said, that is just my very subjective opinion!
I'm with you, goo. I don't think reaching an end goal is success because to many people (myself included) an end goal doesn't exist. Sure, we are always pushing for a promotion or to make more meaningful relationships or enlighten ourselves in some way, but once to achieve that there always seems to be something else around the corner. To me, success is found when you can enjoy the process of striving towards your next goal. I consider myself most successful when I am not just wading through life looking forward to the weekend or something I have planned; I am successful when I can truly be content with my morning coffee and look forward to saying hi to coworkers and find joy even in a monotonous environment.