It's a good name. If you are interested in marketing, don't change anything. It will show people what you are about = blogging about marketing.
I'd say a name that reflects your content is better than a usual name, that doesn't ring a bell.
As for your posts, I'd add a "[marketing advice]" or something similar to the names of your posts that discuss marketing specific topics. Make it a series.
So... paranoia :D
Exactly, I just thought that this name would give me authority when talking about marketing related topics. Yet I feel that now I can't really talk about anything else. Thanks for your reply and for sharing your thoughts!