[Names highlighted to save you time in case the fanboy fluff is boring]
I was fortunate enough to get a ticket to the Champions League Final at Hampden in 2002. Zidane obviously the highlight but a number of others who were exceptional players (Figo, Raul, Ballack). I vividly recall watching Zidane as he shaped his body whilst keeping eyes on the ball for what seemed like an age as it dropped from the sky, before volleying it past Butt in the Leverkusen goal.
My wee team is Barcelona and I went to see them play Real at the Bernabeu in 2015. It was the best overall and individual performance I've seen in the flesh from any team. Barca won 4-0 and Iniesta ran the show. He was just sublime. He got a standing ovation from some Madrid supporters when he was subbed late on. That game included Cristiano Ronaldo but he, and the whole Real team, were played off the park. Got to see a short cameo from Messi as he was returning from injury.
Next to Iniesta in my tiki taka lovefest is Xavi and I saw him play for Spain against Scotland in 2011 in Alicante. If my memory serves, we didn't touch the ball for the first few minutes and it's likely he alone had more touches than our entire team across the 90 minutes.
We've had some incredible players in Scotland in the last few decades (I'm 36 and very jealous of some names mentioned in this thread who played before my time) with Gazza, Laudrup and Larsson probably being the pick of those I've seen in the flesh.
The best individual performance by a Scot that I've seen in the flesh was a young Barry Ferguson running the show against England at Wembley in the Euro 2000 play off second leg in Nov 1999. The whole team were brilliant that night but he in particular was outstanding, bossing the middle of the park against an England midfield including Ince, Redknapp, Beckham and Scholes.
I cannot write this post and not include Killie players so, for what it's worth, the best I've seen in my time are Tommy Burns, Ray Montgomerie, Ian Durrant, Alexei Eremenko and Kris Boyd - all experts in their various and varied roles.
In years to come, I'm confident of adding Alan Power to this list.
Has anyone mentioned a goalie yet?!