Questions about enneagram types and wings

[Ezra]

If you're deciding between a couple types, are you most likely to be whichever type's wings are more favorable than the other?

Try not to use wings as a way of identifying your (or, for that matter, anyone else's) type. The socionical equivalent would be something like identifying your type based on intertype relationships.

Nonetheless, it's perhaps a good way of confirming. Which types are you considering?

Also, do Enneagram "professionals" believe that wings can change?

Wings don't change. They're actually quite important when you get to the bottom of one's type, for the sole reason that they are a tool for identifying two different kinds of people of the same type. Take a look at a 6w5 and a 6w7, for example. They can look easily like two different types. A 6w7 is what most descriptions are biased between. However, the 6w5 is more independent, and can resemble a 5 if phobic (technical, loner, expert in certain fields and conerned with knowledge), and even an 8 if counterphobic ('Don't mess with me' stance, aggression). I find that most 6w7s are very easy to identify.