Fuzzy (Sorry, not sure I know your name),
The last finial's teardrop is wrong as it could not form naturally.
Okay, let's try explain that. The flowing curve around the base of a teardrop (actually raindrop), and the stretched out tail should have a smooth flow. In nature a drop of water wants to be a sphere, gravity, friction in the air caused by its motion causes the elongated shape but it's still trying to pull itself into a sphere. To fill the smallest possible volume of space.
So the line of the curve above the onion, into the tail goes through too fast a change of curve, you could do that but it would take a defining cut to make the sweep between them look right. Look at the first three drips, the curves are smooth, they flow around the onion and up the tail.
There is a bad curve at the top of the tallest white finial, the outward sweep of the curve into the top part, goes through too sharp a turn and then almost a flat line to the rim, but as it's so small against the rest of the finial and as it would be part of a much larger form, it would not normally be noticeable.
Next post I'll show some of mine - with critique.