Jack, as of late.

Jack says:

Ma/Mum 

Daddy

Nee (nanny)

Pa (grandpa or potty, depending on the context!)

Pih (pig)

Bee (blanket or bink)

Bree (cousin brianna)

Pees (please)

Bah (goodbye)

Lo? (hello?)

La La (when he wanted to watch Muppets Family Christmas)

Joe (Curious George)

Doh (door)

Hah! (hot - which he says about everything)

Ray (raisins)

Chee (cheese)

Pee & Poo (of course)

Ha (hat)
He (hand)

Shoe
Dah (dog)
Toe (toast)

Tee (teeth, tegan - who lives upstairs, or tink - his aunt & uncles dog)

Jack loves:

banging on his drum

pointing out pigs or saying "mooo!" when he sees a cow

watching Curious George

to say goodbye to whatever is being flushed down the toilet

chocolate soy milk

pointing out body parts, especially nose, tongue and eye

yelling "Maaa" or "Dadddeeeeee" when he wakes up, needs us or if we leave his line of view

playing with his cousins

holding hands, especially when praying before meals

requesting a kiss if injured, or giving a kiss if you seem in pain/sad

playing with anything that's not a toy

waving at people

his blanket (bee)

playing guitar with Daddy

wrestling with Daddy

Daddy in general

I know there's more for both categories, but that's all I can think of!