I just wanted to know what are the advantages and disadvantages of having heavier string gauges are. I know that you can play in lower tunings like C and D but what else does string gauge determine?
you get more tone from heavier strings
for a while i had 10-60s on my guitar in standard tuning and they sounded amazing, compared to 9-46s i had on after them
they are harder to play though, as far as bends and stuff
Vikings? What Vikings? We are but poor, simple farmers. The village was burning when we got here, and the people must have slain themselves.
The sound quality improves with heavier strings. I just like the feel of them, .09's and.10's are too sloppy for me, I need 0.11 in standard tuning, though I know many people find that uncomfortable.
Basically, use them if you want to play heavier Music, personally I prefer lower gauge strings due to me being a very gentle and calm picker.

You should try a Scalloped Fretboard and Heavy Gauge strings, they compliment each other well.