I've had various instructors also. Some cyclists and some not. Some good, some bad. Like all trainers, you have to find one that fits your style (and musical taste). Unfortunately, they may not always fit with your schedule. At our gym, the most popular class is 6:00 am and the senior instructors teach it (senior instructors get to pick their class time and get paid my the student. This class is always full because of the time slot. However, student feedback does get taken into consideration).

Our spinning class is popular in the winter, see if you can drop in and try a few different instructors before you sign up for a whole session. Ask around. Talk to the people at the front desk and see if you can get recommendations. Check the comment board! I've noticed men are finicky when it comes to the music choice, but I can spin to anything with the right beat