Perplexity.ai - a good AI that searches the internet to help with results, so you can get very up-to-date answers, like the latest summary of a football match etc.
I have no favorite AI. As to the image generator AIs, I abandoned them when I learned that if I used them to generate illustrations for my novels, I could not copyright the AI-made drawings.
I was thinking of using one of these image generation models to create a good image for the homepage here at AWF. Maybe it could do an improved logo too!