hmmm in another post a guy said he had 10 minutes into the designs he shared, which I'm quite sure is an exaggeration & therefore wonder why he mentioned it at all...
...now you mention your 3 years of occasional tweaks or "playing" and again, and I have to wonder why you mention that...
...but since you did, I wonder how well you do with the graphic design business in general? Graphic artists often find difficulty in doing designs for themselves, because we can become our own worst client, being eternally picky & demanding... but that should be demanding of the best work & pushing ourselves to keep making improvements, which I can't really say I'm seeing here yet.
If you have the design skills to succeed in this business, then that is what really matters. If some block or other is keeping you from doing better on your own design, read Pat's thread about paying another designer. I was proud of a logo I designed for myself, & I did go through some tweaks over the years, but then I hired Dan Antonelli to explore ways of developing my existing logo, retaining some of the brand recognition I felt I had acquired in my market, while pushing the overall image a few notches higher. Because of my attachment to my old designs, as well as my own "designer" self-identity (for better or worse) it had to be somewhat of a collaboration, but I feel Dan's contributions really took my work well beyond what I had settled for during the previous 10 years...
..so with all due respect, I think your logo would be questionable even for selling peeing Calvin's at the swap meet... but if you sell graphic design... you need some serious help overhauling that logo in it's entirety!
(and by the way... never ever stretch Avant Garde)