I am currently laying out the board for an audio amplifier I am working on. The power requirements aren't very high - there won't be much more than 500mA flowing through any given trace. However, I have ample space on my board, so I was thinking about using wide rectangular fills (40-50mil wide), like the following:
Having wider traces minimizes resistance, an in addition to being much wider than they need to be, I find a layout like this to be aesthetically pleasing. However, could any issues arise from routing like this instead of using thinner traces? In other words, is there a reason why I should only make traces as wide as they need to be?