Depends on what type of figure your making. Some are the best at articulation but lack the looks
of seamless bodies and vice-versa. Then there things like color, shape, height and age to consider.
I like the Hot Toys or like bodies that have both. Skin covered torso with regular arms and knee joints.
Those are my first choice.
If no skin is needed to show, I use Triad Alpha, because is has a ton of articulation.
And it's made to come apart rather than break.