Oh this hits close to home.  I currently work in an environment that many other employees refer to as toxic.  I have been here for 13 years, am the most senior person in my department, and that makes me the go to guy for every user that has a complaint about the I.T. department.  I have a boss that doesn't understand separation of work and home, no matter what he says, because it is rare to not get a call on a vacation day, and of those calls, they usually solve the issue without my help.  Hence, I have blocked every number in our department on my personal cell, so I get the voicemail after. 

I am ok with what I do, I am a DBA that doesn't get to do much DBA work because I also support several other systems, and those system problems push a lot of DBA work aside.  Which is stressful, because the SQL systems are important, more so than the applications that use it.  And having a boss that doesn't know how to say no, and just keeps accepting the projects, and throwing them in the pile doesn't help either.  Yes, I wake up, actually, I go to bed dreading the workday the next day, and it is really more because of a few people, rather than what I do.  And with a cardiac incident to back up the stress scenario, I know I should be out of here, but giving up the load of vacation days I get per year, the flexibility, I do work from home at least one day a week, and the short commute, along with the retirement benefits, makes me stick around and try and keep my level of workplace tolerance down to a level that I can deal with. 

I get that people get burnt out, and I may just be a pile of ash here by now, but I have less years to get to retirement than I have worked at this job, so does it make sense to start over somewhere?  Granted if I go to another governement entity with the same retirement plan, I get to keep that up, but still lose in other areas.  So, as I said, it is how much can I tolerate day to day, that I have allowed myself to live with staying in this position.  Luckily, I have several co-workers that feel pretty much the same, so we have our own little support group, which can be a big help and make the difference on a bad day.