I think I was a good amateur at Counter Strike 1.6.
Being playing since 1.1, and in 1.6 I felt I had improved my game in every aspect, I had aim, fast reflexes, I could quick scope, had no problems playing with snipers, pistols, AK47 or M4A1, and played on the most respected servers in my country, where sometimes you would see pros enter and play a few maps.
I also watched a lot of matches from the CPL and WCG, back in the day where the best teams were SK, 3D, MouzeSports (something like that), aAa, NiP.
That said, I've almost never played on a team, so on 5v5 I may have a problema adjunsting.
So now I'm looking forward to CS:GO to play against people from other countries and see how it goes.