Well, I was a Trekkie in 1966, and I see no reason to change now.
Hey, aren't we supposed to all be in this thing together? All fans of the same thing? I never understood why a "branch" of that fandom wanted to separate itself from a "less desireable" branch. That is definitely NOT in the spirit of Star Trek.
So if you're calling yourself a Trekker because you think you're better than Trekkies. Got off your high horse and get a grip, pal. And if you think Trekker is more dignified sounding than Trekkie, you should also realize that 95% of the rest of the world still thinks you're a dweeb like the rest of us.