Im all about branding.. If you're plans are to build a brand, then your brand pic (and try to add you in it some way).. It's best to just use yourself though if you're just creating a regular page.. If you shy about your pic, hit up fiver and check out one of the jobs where they'll cartoonize your picture. These are great fiverr jobs.. Hope this helps..
Then why not you place your original photo on this profile. I think if we are using the professional profile for individual company or business then we can use logo or banner for them.
I have another Great Idea, why don't you use Gif Image with your Picture. I mean a moving Picture can attract others better then a still. So create a GIF Image with your pics. If you have any website or business then you can connect business pic in sequence with your pic. I have an Example for you See that account. twitter.com/#!/electroknol Now decide and reply me.
Yes, I agree - I have a GIF of a Royal Naval Sailor as my Twitter picture, and he salutes - I like it, that's why I chose it, and, as a former member of the Royal Navy, I'm fully entitled to have it.
If you are using to marketing your brand, then put the logo of your brand as your profile pic. But if you just want to be popular on Twitter, the best pic to use as profile pic is a presentable you.
Use your own picture . I am using mine picture but osme animations are also included to attract the crowd .. you can check out here @electroknol