Personal choice on brake pad compounds I think.
General info;
GG are organic pads, good consistent behaviour in wet and dry but less outright stopping power. Low disc wear as the pad is softer.
V Type, New semi-sintered compound, supposed to be a balance between power and control. Popular on heavy cruisers and tourers.
HH, sintered metallic pads, most powerful and able to run very hot but some find them grabby and a bit unpredictable in the wet, they also wear your discs out faster.
My bike came with HH pads front and rear but I found them overly grabby, they unsettled the front a bit and the rear was like an on/off switch, I was fairly newly back to riding though so my skills were lacking. I now run V Type front and GG rear which I'm happy with, if I need more stopping power than that then I've braked too late ;)
See what you've got in there now as a starting point and decide if you want more or less stopping power than you have already. I do like the feel of a less aggressive compound in the rear brake though, it's made slow speed control easier.