I tend to like shallower water...20-30 ft, rock bottom. shoals, points, or nearby.
also like mid lake humps in the 40-60 ft depth ranges, with real deep water nearby. here, bigger fish tend to suspend, and 20 ft down in deeper water always a good choice.
water temp pretty much consistent lake-wide in winter, so don't be afraid to fish shallow...10-15 ft can be great sometimes.
Personal preference, is to rig a tip up or my trusty fishhawk wind jigger in 10-15 ft of water, with a dead smelt, and jig out a little, in 25-40 ft of water.
never did real well in deep water - over 80 ft. usually small fish on bottom only.