Kurt Angle to me is great because he can have amazing matches with big men (Undertaker, No Way Out 06) or little men (Rey Mysterio Jr, SS02) and everything in between. He can have had hitting matches (Austin, SS01) or dramatic ones (Michaels, WM21) or a straight up pretty technical affair (Benoit RR03).
On the mic he can be deadly serious, comedic and again seemingly everything in between. He looks the part, he's reinvented himself a good few times and is credible due to his Olympic credentials. You can easily buy into Kurt Angle as being legit.
Also, like all great workers you can daydream about impossible matches with stars before and after his time on a certain roster. Kurt Angle of 2002 vs Bret Hart of 1994 anybody? Or how about CM Punk vs the Olympic Hero?