Me too. During Wimby 2005 or 2006, or example . I simply couldn't imagine him losing. But I am not complaining. The possibility of defeat heightens the joy of victory.
Naw, that is bullshit IMO. People forget that Federer used to actually struggle heavily in some tournaments. But the difference is, Federer knew how to peak very well and play his best tournaments at the end of slams. Halle 2006 was one example. He went that whole week playing 3 setters against nearly everyone, and had to save a couple of match points against Rochus, then he came to Wimbledon unstoppable. Dubai 2005 was another tough event, where he almost went home in the first 2 rounds. Cincinnati 2007 was another difficult tournament, where he struggled against Baghdatis in 2 tight sets, had to beat Almagro in 3 and should have lost against Hewitt in the semis. Sure, Wimbledon itself was perhaps one of the events where he didn't struggle much, but he did the struggling in Halle several times prior and I think people forget this.