In my first development job, I worked very long hours — perhaps because I didn't have great mentors, often worked remotely, and found myself doing tons of learn

In my first development job, I worked very long hours — perhaps because I didn't have great mentors, often worked remotely, and found myself doing tons of learning/education just to get by. This was OK for a while; I had to pay my dues and learn how to do the job, but I do not think it is sustainable, after the first year I burned out and was ready to move on. Now, I prefer long, uninterrupted workdays, but I do not like to work much more than 40 hours per week. The traditional 5 day per week model is not perfect, though. I prefer 4 longer days (10-12 hours), and 3 days off.