I chose my nick quite a few years ago in an instant of auto-exaltation (as you can clearly see following the link) after having read the term in a popular science mag. It has stuck since then, so I've not had much opportunity to really regret the choice, period. But then also see the remark in my home node.
As a minor side note I prefer it to be pronounced like if it were in Italian, than as in the original English version. Also, since "blazar" is still too long, friends often abbreviate calling me "blaze", but as I said I don't like that and then I prefer to interpret it too like if it were written in Italian, i.e. "bleiz".
That's all folks!