Greek: Athena, I've always been intrigued by the idea of a goddess that represents both war and wisdom.
Africa/Caribbean: Anansi, he was my introduction to trickster animals and his stories were always the best! I also loved how he took the form of a spider most of the time, that just made his feats so much more powerful! Tricking the mighty tiger in the form of a tiny spider, go Anansi!
Celtic: The Dagda, for a while I considered myself a pagan growing up, he was the main god that I chose to follow. He seemed pretty chill whenever I tried talking to him, I dunno.