I've been really hooked on zone recently, especially on the metropia tracks, since they're by far my favourite tracks in the game. I recently attained a score of 152810 on Metropia Reverse which earned me the 12th spot on the worldwide rankings (that is, if they're actually accurate and not full of glitchers or whatever like some of the other tracks):
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I'm the sort of person that focuses purely on getting those perfect laps and hitting as many speed boosts as possible, because the score gain in the first part of the run can be massive. Unfortunately, once I reach the higher zones I just seem to full apart and hit wall after wall because I'm so used to taking a line which gets me the speed pads as opposed to avoiding the walls (sometimes the transitions between different speed classes can be really distracting!!!!)
If anyone has particularly good zone scores, I wouldn't mind adding them and giving a few goes at trying to beat some of them.
My PSN is LightningRacer.