[quote name='EssentialTension' timestamp='1392232421' post='2366302']
I prefer no lines myself but I'd say you should be putting your finger right up to and on the fret even when there are frets. Are you putting your fingers somewhere else?
[/quote]
Taking things to extremes, if you put your finger right up to where the fret is, then why play fretted at all? Surely the frets are there, as the other person says, to do the "precision" bit, allowing you the player (well, certainly me) to worry less about the intonation and just hit the gap between frets as I play up and down the neck, at varying speeds and varying levels of difficulty. Close to the fret is clearly good practice and good sense, but the whole point of frets is that they do the micro-accuracy work for you, surely?