He was sexy, edgy and charismatic. From his Stateside breakout in Tigerland onwards, casting Colin Farrell was a no-brainer; he was a blockbuster leading man, right? In the early 2000s, the kid from Castleknock was everywhere. Films like S.W.A.T. and The Recruit were false starts as a star for Colin, and for a period, a mix of flops…