Nasm Fitness Certifications

Which personal trainer certification to go for?
Which personal trainer certifications are more recognized or accepted? Doing a search pulls up ACE, NASM, ACSM, AFPA, etc. Been in fitness for a while now but never used a personal trainer nor have I done any looking into what it would take to become one until now. Please help clear the confusion. Thank you.
ACE is good, but some health clubs require you to have NASM.
