In the kitchen and dining room I would use 20a receptacles, those with in 6' of water source should be GFCI. GFCI for the outdoor receptacles and the bathroom too.
Then, the normal 15a receptacles (using #14 wire) would use standard 15 a equipment. All must have the 3 hole outlets and romex wire with a bare copper ground. Stab-Lok receptacles with the UL seal of approval are safe to use and much quicker to install.
For GFCI's, it is permissable to use one GFCI and pass through it to other receptacles in the area (Say, 1 for the baths and 2 for the kitchen). GFCI's are usually rated at 15a but will pass through at 20a. The receptacles that are rated 20a are to be wired up with 12-2 w/G and it doesn't hurt a bit to use the 12-2w/G for all your wiring. I bought a 1,000' roll of the #12 and use a 15a breaker on the standard receptacles. I also bought a box of 10 GFCI's, a box of 10 20a, and 2 boxes of 15a.
Clear as Mud? I'll be happy to try to help you sort it out, if you need it.