Which leads me to this point: GIS is used in an extremely wide range of industries/fields (I'm sure you realized this!). From healthcare (think disease tracking/management) to defense/military to urban planning. If I were interested in GIS - I would view it as a tool I'd want to use instead of a sole focus - unless you love the software/DB side of the things.
It'll be interesting to see how you like your food/science and finance courses as both have some positions that could use GIS in gathering and analyzing data. Also - GIS has tons of uses in marketing/sales.
Although I've used GIS in a variety of capacities over the past 12-13 years, I only use it now for the occasional quick check. So try the Esri or MapInfo user forums as well. Ask someone who is actually using ArcGIS or Mapinfo on a daily basis to see what they do, level of programming/search queries, job security, etc..