I like it. Yellow DMGs have always been pretty neat for me because they are far from most popular Play It Loud color. Do an overclock and/or underclock mod, those are always fun.
I getcha. I just found it useful when I did it to my first DMG when I was going through Silph Co. (mainly because it's just Heck). Stick a pro-sound headphone jack in there, then, and call it a day.
Well if your gonna do all yellow take the cart slot (The black thing with the pins that cart plug into, I cant think of the name) from a Transfer Pak from the N64 which was yellow. So its a mega yellow fest then