I lowered the front to steepen the head angle. Makes the bike quicker turning. Like I said, the head angle on the 250R is fairly conservative, so I wanted it a bit sharper for the tight corners that I ride. It worked out great!
However, recently I switched to the BS 090 tires and the rear tire was a bit taller than the stock tire it replaced. I found some weird things happening, so I raised the forks back up 1/2 the distance that it was lowered plus I lowered (made softer) the shock preload from 3 back down to 2. It seem to have fixed the problem I was having and the bike still corners sharply.