Its blooming obvious really, and why PTC have never implemented it on ProE, then Wildfire, then Creo 1,2,3 I've no idea. My £50 Mac CAD package adds a sensible value fillet according to a value I choose in sketcher. Creo just scatters on totally random values and you have to go around cleaning them up and putting in values and making them match manually.
So, here's the brilliant 20 year old CAD idea, when you select fillet in sketch, you get to type in a value, and, I think you might guess what's coming next, when you click on two lines to put a fillet between, it puts that value in, and on the next pair, this continues until such time as you type in a different value.
I know its not a new idea. It really basic, but frankly a $X,000 CAD package really should include this shouldn't it?