I went to a 3-slot belt bag last year and the large Aquaskinz pouch. My back does a lot better after a long night now, and I can still carry more than I need.
So, with that said, my plug bug selection changes every time I change spots to suit the location and possibly rod selection (no heavy conventional with a 30 knot onshore wind if I have to cast, but still a possibility at an inlet where there's only drifting).
I don't change colors with the seasons - I'm not that sophisticated. The changes from spot to spot usually involve the water depth and whether it's an inlet or not.
Regardless of any of the above, there's usually a few black
sluggos and a superstrike needle.