Is there a "sweet spot" when downshifting?

[chandlerbingfl]

I've got a 2009 GZ'r, ~3800 miles, owned it for about 5 months now. Had some minor issues but all in all am quite happy w/ the bike itself. I've noticed that sometimes downshifting it can be quite "clunky" and at other times not so much. For the most part I usually wait till it's barely moving (say approaching a light) before downshifting. As I said sometimes it's clunky other times not... Is this normal? Does it help if one blips the throttle in order to have the gears sync up prior to downshifting. Open to your input, appreciated in advance.

chandlerbingfl