I use liquid laundry soap because it asorbs into clothes better than powder which leaves residue sometimes.
Prefer Liquid because it's better for your clothes, I think.
Powder, I wouldn't touch it with a 10 foot pole.
Liquid....it is more expensive than powered but who cares.
I use Tide (for everyone), Gain (for everyone) and Arm & Hammer (only for rags, dog blankets etc). It is depend whichever goes on sale.