
Eyvalanta |

It's been asked before, but with both answers:
Can Aspect of the Beast be taken multiple times, with a different manifestation each time?
Nothing in the Errata or FAQ regarding this. I have also asked my DM for his take on it. I do not see how it is overpowered in any way. My halfling ranger/shifter wants to channel a little bit more of the inner panther.

Azothath |
Feat: Aspect of the Beast (gnrl)
RAW you cannot take the feat again and that's pretty clear. The feat descriptive text is singular and expects it to be taken only once, no wording for taking it again. Paizo had plenty of time to think about it and did not issue an errata/edit.
Your home GM can make and curate the decision to take it again as he has to think it is fair and be motivated. It does offer various options and that makes it easier. For my home game, yes with cumulative effect.

I grok do u |
Ditto on RAW no. There is a bloodrager (shapechanger bloodline) ability that offers it as a per bloodrage choice.
At 8th level, you gain Aspect of the Beast as a bonus feat even if you don’t meet the prerequisites. As normal for the feat, you must choose one of the manifestations, and you gain its benefits even while not bloodraging. When you enter a bloodrage, you can choose a second manifestation to affect you simultaneously for the duration of your bloodrage.