I have enjoyed it, for the most part. If you like the thrill or engagement or whatever other descriptor you want to use of smaller companies or startups, then it is definitely not that. What it has been is rock-solid stable, interesting, and good benefits and pay.
I've debated looking for another job several times, usually on crappy days, but I still come back to I've been at this company for a long time, I know how it works, I have many of the benefits of tenure (more vacation time is one, that managers and other groups give me more of the benefit of the doubt is another), and maybe a little bit of me being "boring." I don't want to change for the sake of change and I'm happy to go to work, do something I mostly like, get paid well for it, and then go home and live my life separate from work.
Hope that gives you some insight into why someone would stay at the same employer for so long.