Create the circular model with enough segments and then use soft selection or proportional modeling to make it evenly.
When you have problems with the smoothing on the center, just use more segments and dont use subdivisions.
Another aproach is a cube, just subdivide it 2 or 3 times and then spherize, or shrink wrap it on a sphere to get it spherical, then just squash it.
Because of the quad topology of the cube method, there will be no pinching on the center vertices.
Replies
When you have problems with the smoothing on the center, just use more segments and dont use subdivisions.
Another aproach is a cube, just subdivide it 2 or 3 times and then spherize, or shrink wrap it on a sphere to get it spherical, then just squash it.
Because of the quad topology of the cube method, there will be no pinching on the center vertices.
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