I couldn't care less what I'm called as long as it's not 'grease monkey'. My maroon book is titled Aircraft Maintenance Engineer's Licence but I wouldn't actually consider myself as an 'engineer' proper (Etymology: Middle English
engineour, from Anglo-French, from
enginer to devise, construct, from
engin).
We're not going to get any more respect by insisting we're addressed as engineers (as Mr Brown intimated), any more than a cleaner demanding to be classified as a 'sanitation operative'.
As long as the pay's in the bank at the end of the month, I'll quite happily be a tech, mech, maintainer or spannerbender.
Speaking of licences, I was rather miffed to have my AMEL number changed from 223** to 409***%. You could generally date someone by his/her old licence number.