I have been a blue belt under a school (And lineage) that is very respected. My present job requires me to wake up very early which means I need to be in bed extremely early as well. Timing wise it is not working out for me because at my school, classes tend to start a little later in the evening and go on till late as well. Getting up in the morning is a pain! Another school in our area has class times that suit me more. They are also very well respected and often put out fighters who compete against our team mates in tournaments. I am debating whether to join them just to keep my BJJ going. It would mean facing my own team in tournaments sometimes if that ever happens. I am wondering how common (or how taboo) is it to change schools and join a rival academy?