Pillows, drawstring backpacks, stuffed animals like snakes that don't even need a pattern. Pillows are a funny thing, my boys love picking out fabric for a new pillow. I usually buy half a yard and make a 14" pillow. Pillowcases if you have enough pillows.

Vests with tons of pockets for stuff. Raglan t-shirts, I think most print knits look better as the the body of the shirt with solid color sleeves. Costume stuff can go beyond Halloween, I made a raincoat from waterproof nylon that is trimmed out as a firefighter jacket. It is a hoot to see my 3yo ds wear it on rainy days.
Then there are always pjs and shorts, lol. Check out these cute clamdigger length pants at
Lands End . I might have to make a pair of those.
Compared to sewing for my daughter, what I miss with the boys is sewing special occasion clothes. I've made flower girl outfits, her first communion dress, birthday dresses, etc. for my daughter. I really can't get excited about khaki pants and a buttondown shirt. And the older the boy, the more boring it gets. So sew cute stuff quick before those boys are too old!