Hi! Yes, I love the designs you have submitted, I'm so sorry I haven't been able to provide complete feedback because my boys are sick. Thank you so much for your patience.
Re which font to use on your blog; personally i would use a different type of font from the logo (serif), so a sans-serif font would be better, keep in mind that unless you are using web fonts, you will be restricted to the basic fonts ie. Arial, Helvetica etc. for sans-serif and Times, Georgia etc. for sans-serif.