Well due requests (well from Pho anyway), here are the answers
No 1 Dou - Ashita no Mikuru - an easy one to start with
No 2 Pro - Lucky Star Pocket Travellers - kinda a tricky one but there are several other Lucky Star manags not drawn by Yoshimizu Kagami
No 3 Pro - the wonderful Mahoraba - I was rather impressed everyone got this right.
No 4 Dou - Spencer & Candy no Shotaiken
No 5 Pro - Pani Poni - it really is pro

I have put up the back cover as well to show the Squeenix logo
No 6 Dou - Uchuujin Desu Ka - while it is by a professional author, it is a doujin release
No 7 Pro - Sketchbook - once again, another "rough" looking profession manga. A rough looking manga but the anime has awesome cats in it
No 8 Pro - Elfen Lied - this is from the first chapter, and it gets worse!
No 9 Dou - Kaanabi-chan to Boku 2
No 10 Dou - Tiger No Pants - not at all chosen for the name

I'd have easily gone for pro on this as well
