I have been on 40+ courses/training over the span of about 15 years but ever did any exams or certifications. I feel that I DID NOT LOSE ANYTHING not having the

I have been on 40+ courses/training over the span of about 15 years but ever did any exams or certifications. I feel that I DID NOT LOSE ANYTHING not having them. If you like to take exams then you may do it - but if you are about to pay for them from your money then I am not so sure its worth it. My profile is generally BSD/UNIX/Linux sysadmin with some addons needed in between like storage/virtualization or high availability clusters. If I got asked why I get to the trainings but did not get certifications I reply that I went for these trainings for learning and knowledge (and eventually things I needed to ask a teacher directly about them) and that was my main interest in them - I do not need a 'proof' that I 'got it and understood it' at the classroom. Maybe certification is more needed in other areas ... Regards.