Ronaldo - was hyped when we signed him from Sporting as a unknown young player, thought we got a wonder kid and absolute gem who could be as good as Giggs after watching our friendly match against Sporting, turns out he is even better than Best.
Rooney - we signed him when he was already hyped as generation type of English talent, turns out he really is.
Ferdinard - We paid premium fees for him, the highest fee for defender at that time, just imagine spending 80m on Maguire, and he turns out as good as Van Djik.
VDS - we bought him for the experience and reputation, he gives us more - a CL trophy.
Ruud - He has insane goalscoring stats from Dutch league, and was widely regarded as one of hottest new up and coming striker at that time. Turns out he becomes one of the best striker in Europe.
I didn't have high expectation when we bought Stam, Vidic, Evra, Carrick, De Gea etc at that time, so I didn't include their names here. Van Persie is another one who meet my high expectation, but his good form only last for a season, shorter than what I may have expected, so I didn't include him too.