This seems to be the order most people put his best years in when ranked from best of the best to worst of the best, with '05 and '06 being the ones that alot consider interchangeable (rationale is typically something like: 05 was better tennis, 06 better results). What I've noticed though is that when it comes to what the best MATCHES federer ever played were, then nothing from '05 is ever mentioned. And by best here I mean highest quality of play from federer, not best overall match, in which case the AO semi with Safin gets mentioned alot, but this surely wasn't one of fed's best matches based only on his performance, although he certainly still played awesome in that one. Fed's had plenty of better performances (AO semi against roddick, '06 TMC against blake, 03 wimby against roddick etc) I'd say he's actually even played better against Safin than he did that day, say in hamburg 2002 or 04 tmc.
But anyway, I was just curious why so many people rate '05 so high when there don't seem to be that many standout performances? Is it just because of the consistency of victory?