The flanker, who had just captained Wales to a second consecutive Six Nations title, revealed playing for the Lions was a fulfillment of a lifelong ambition.
But being forced to sit out of the decider, in which the Lions cruised to a 41-16 win, through injury was a bitter pill to swallow.
"At the time I was quite disappointed," he told Sky Sports.
"In the three biggest events I've been involved in as a player - the 2011 world cup I couldn't finish because of the red card, the Grand Slam in 2012 was injury plagued for me and I went off at half-time and to then not finish the Lions tour in the third Test - I was just desperate to finish one of them.
"In hindsight now, if someone had told me that I would play four games at No 7, all as captain, I would have loved that and it is a good achievement, but I guess you always want more.
"It was a dream come true. Being presented with my first Test jersey, the No 7, by Ian McGeechan was a highlight for me.
"He spoke very well and it really put into perspective what playing for the Lions meant. I took the jersey back to my room and laid it out on the bed so I could see the No 7 that I had worked so hard for, for so long."