Woodworking

I just built a small shed using 7/16" OSB for all the wall and roof sheathing so 1/2" ply could work well for that too.

Some other things I can think of are a shop cart and assembly table, both would be nice to have. Been meaning to make a cart to wheel around my dust extractor + dust deputy cyclone.

Jigs are always handy, but you may prefer to build those out of 3/4 Baltic birch. The ones I reach for often are the crosscut sled, shooting board, bench hook, tenoning jig. Sacrificial fence and L-fence are also great additions. Also, a mortising jig for plunge router if you do a lot of mortise & tenon.

Other miscellaneous storage like cordless drill holders, charging stations, chest of drawers for hardware are also worth making to help give things that tend to wander a home.