I went back to my old company after an absence of 5 years
Main reasons – I was under a lot of stress at my, then present job, I liked the work at the previous emloyer, I got on really well with the people I worked with, I knew what to expect from them and vice-versa and to be honest, it was easy just to slot back in.
The reason I left in the first place was the 70 mile round trip to and from work, across the Dartford Crossing everyday, plus some of the management is a bit direct, shall we say.
First couple of months I hated, and questioned my sanity, but they were pleased to have me back, and I settled in to the old routine eventually.
However, after 2 years a job came up, 1/3 of the distance from home, and for similar money, so after much thought I left.
I did feel really bad, but I’ve been told I’d be welcome back anytime, so left on good terms.
So, I think what I’m trying to say is, the reasons you previously left will probably still be there, but I made the move with the thought that better the devil you know, and that it wouldn’t be forever.