Mr-914 wrote:2. Change jobs. I've worked corporate for 14 years. I'm starting at a consultancy in two weeks. Maybe I'll be horribly disappointed, but I'm sure I'll learn a few new things and get a couple of those "oh-my-god, how will I ever get this done!" moments again.
I'm your opposite. I did consulting for 15 years and have been in corporate for the last 10.
Back to the OP. It's a tough spot, but the question is before you do anything, what is it that will give you fulfillment? It certainly isn't necessarily a market segment. My whole career has been in medical devices and quite frankly I hate hearing people in my field saying how great they feel helping people. Like comfort doesn't count when you are not sick or injured. I get more comfort from the 5,000 songs on my phone than the disinfectant wipe I used prior to my recent surgery.
So before you do anything rash like burning a bridge at lunch today, make sure you have a plan. Use your current situation as a tool to your next step. My current corporate gig will pay $6K annually to pretty much any education I want. If I want to be a lawyer for the next step, they will pay for it.
Personally, I learned a while back, I just like to make stuff. Even as my management duties have increased, I make time to make stuff, whether it is developing ideas for other people's projects or side jobs. If I had my druthers, I would be making sculpture and smoking like a chimney. But due to other life choices that are better than being a bum artist, that will have to wait until "retirement".
On a side note, having worked for small companies (0-100 employees), medium companies (250-1000 employees) and currently a yuge company (26,000 employees), by far the best experience was with a privately-owned medium-sized (600 employees) company.