Yarn Recs Requested!

I have been knitting for a long time now, but my niece and nephew have requested stuffies, so I’m on a quest to learn crochet now. In that vein, I’d love to know your favorite yarns for crochet! Amigurumi, wearables, blankets etc. What are your favorite weights, fibers, brands? What tools do you think are worth investing in? Any and all recommendations are welcome. Thanks in advance!