I regret staying at some jobs 2+ years and having my tech skills rot.

I also regret not joining companies that consult me out to clients sooner. It led to a massive increase in my own confidence and my technical skills across a lot of industries and technologies.

I also regret trying to be loyal to some company. It never pays off.

In the last 6 years I’ve averaged a job change every 6-8 months and have increased my base salary from $125k to about 4x that.