Lol, Liz player syndrome? Even though I started out with BB, after I played P4U (and I spent way more time on P4U in comparison), I never dropped the habit of holding on to bursts. I don't usually burst the first round, if at all during an entire game. I've gone entire sets with hardly bursting lol.
I don't think it's necessarily apathy towards the match to not burst, but sometimes you feel like you can't run it back/don't know where to burst/etc.