The Portugal international, who struck 46 Primera Division goals in 2011-12, rates last season's title success as the highlight of his Blancos career to date
The Portugal international played a key role in his club's Primera Division title success, netting 46 times in total, and freely admits that ending Barcelona's run of three successive titles represents the highlight of his Blancos career to date.
"I think the best moment so far was winning La Liga," Ronaldo mused during an interview on Thai television. "Because I think the Spanish league is the hardest in the world.
"It has great teams like Barcelona and to finish nine points ahead of them ... that says a lot."
Ronaldo, who is currently holidaying in Thailand with his girlfriend Irina Shayk, was then quizzed again about Portugal's penalty shoot-out defeat by Spain in the semi-finals of Euro 2012.
The former Manchester United man was entrusted with the responsibility of the Seleccao's fifth spot-kick but he never get to take his turn, with La Roja clinching a 4-2 victory thanks to Cesc Fabregas.
There was great debate over whether Ronaldo should have been used further up the order by Portugal boss Paulo Bento, but he still feels that it was much ado about nothing.
"They are just decisions," he mused. "I remember when I played the [Champions League] semi-final against Bayern Munich, I went first and missed the penalty.
"So, anything can happen; penalties are a lottery."
Ronaldo is currently on an extended break after his exploits in Poland and Ukraine and is not expected to link up with Madrid until they embark on their pre-season tour of the United States later in July.