Did Guan Yu ever do anything noteworthy?

[Frankel]

In the TV series he really peed me off towards the end, I hold him largely responsible for Shu's demise.

[Xu Yuan]

The TV series went over the top with Guan Yu (along with the Emperor, gah! What a disgrace to his memory). Nowhere in the novel and certainly nowhere in history did it show Guan Yu as being so arrogant as saying that he would kill his (adopted) son to embark on an impossible mission. I posted a link earlier in this topic to the analysis of Dr. Rafe De Crespigny on the situation in Jing which should help spell out the situation in a much better way than the TV series did.