Both is great. Winning is self explanatory why its good, while losing on the other hand is great, but great with a hefty dose of patience and discipline. MJ missed 9000 shots, yet hes considered the best mid range shooter in the history of the game of basketball. Lebron lost himself 6 finals, but hes the icon today, Tesla was first rejected and so were his patents, all these guys were made through losing and trying and repetition and discipline.