Perhaps the research group and the culture plays a part on people taking out a good experience out of the PhD. The problem is to find the right place at the rig

Perhaps the research group and the culture plays a part on people taking out a good experience out of the PhD. The problem is to find the right place at the right time for you, matching your interests, and having people pursuing research with a reasonable amount of ego (note that I didn't say 'no ego').