My favorite review on LinkedIn is one where my former co-worker said that he would "go to war with me at his side." Is there any greater compliment? I like that better than if he had said I was "the best" person he ever worked with, because all in one phrase it conveys that I am loyal, capable, aggressive and hard working (which are good traits to have in my industry). When I write reviews for people I really admire, I try to shy away from saying they are "the best" unless I'm also going to follow that up with specifics: "one of the best I've worked with in vendor management; he commands the respect of his vendors through accurate communication and attention to contractual details" says a lot more than "may be the best employee I ever had." Know what I mean? But no, generally I don't wonder where I rank in my manager's mind, because I already know. When you work with a superstar, you know it. Ideally, you emulate them and surpass them, and become the best yourself. ;)