I do, but I also believe a lot of the time that preconceived image is put there by an external force (usually the spirit itself) and this is the way it feels most appropriate for us to view it at the time! In my experience, it's best to go with the flow - make sure you're grounded and protected, get to know the spirit and ask why it presents itself like that to you and if it would be comfortable showing you itself in another form. As far as I can tell there are no set rules as to how a spirit should appear; my patron deity is traditionally portrayed with the head of an ibis or a babboon, yet I've encountered him in several forms.
Also, something I've found helpful in this situation - if you're worried that what you see isn't their actual outward appearance, try to become familiar with how their energy feels, this is a great way to recognise (and sometimes understand) spirits you encounter.
Anyways, good luck with your pathworking! I've not read into it much, but I'm now going to go have a little search on the internet (IMG:
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