I viewed the 14 slides in your PowerPoint sample. Gray is usually not an interesting color, even if it is a gradient like the backgrounds on all of your slides. I can give your background gradients of other colors or photographic backgrounds. Your photos are dynamic, and your logo is interesting. Therefore, unless you want to include other photos and a different logo, I would keep these. I can enhance your presentation by including animation and transitions. I use PowerPoint 2010, and my credentials include a Bachelor of Fine Arts degree in photography. I look forward to workingwith you.