I don't have much nostalgia tied to Kirby as I didn't really grow up with games, but I got into Kirby around 2010-2013-ish through some gaming content as well as the anime, then at some point I took a break from Kirby for like 6 years, and then got back into it during the later half of 2021.
Anime Kirby is definitely my favourite itteration of Kirby. He's the most precious baby I've ever seen and frankly, he makes the show itself 10 times better just by existing.
So far I've played Star Allies, Forgotten Land, Planet Robobot and Triple Deluxe as far as main-series games go, so my hands-on experience with abilities is limited to those games' rosters.
In Star Allies my go-to's are sword, hammer and yo-yo, but I also enjoy cutter and wing (wing mostly for movement).
In Planet Robobot my favourites are sword (again), archer, mirror and hammer.
Triple Deluxe actually surprised me with how much I enjoyed Beetle. I recall not really liking it on my first Star Allies playthrough, but maybe it's time to give it another chance.
For Forgotten Land, it's hard for me to pick a favourite, as so many (especially upgraded) abilities are really fun to use.
If I had to list a few, I'd probably go for Noble Ranger, Meta Knight Sword, Volcano Fire, Toy Hammer, Space Ranger, Morpho Knight Sword, Dragon Fire, Masked Hammer, Crystal Needle and Blizzard Ice.
Aesthetically, my favourites are probably beam and ghost. As well as Meta Knight sword, I just think it's cute. :'3