I really love how this is basically someone writing 心 and then getting frustrated because they wrote it badly so they crossed it out
I don’t now about nyoom, but I often say (in my head) swishy-swish or squeeky for some components. And 氵 is dada…da.
My favorite radicals would be 四 or 糸.
I hate 心 and 也, because I can never get them looking right.
I was so curious myself I actually googled it 
. I thought it’s something like セツセツ, but alas, Tofugu has this to say:
Cutting
ざくざく Chopping the stalks off of vegetables
さくっ・さくり・さっくり Cutting food with a sharp knife
More here: Japanese Onomatopoeia: The Guide
My favourite is 鳩
水、氷、and 永 have always been favorites, 月 and 何 are fun too, but i’ve grown to love writing many of the kanji i’ve learned over the past year.
In a similar line of thinking, やすみ is a very oddly satisfying, “symmetrical” set of kana to look at for me
都. The differents swing are natural and feels satisfying.
月
It’s just so simple and elegant.
我 for me. Not exactly a @Redglare swish nyoom, but the stroke order makes me feel like I am sword fighting with my pen.
It has all of the different types of strokes in one compact kanji, so it gets used for practice often.
Eh, probably something like 木 ? Really easy ones, I can’t write complex ones from memory
I like 中
It looks nice and clean, and I married into a Nakagawa family. Plus, it’s relatively easy to write.
Then the stroke order shatters your dream. ಥ_ಥ
It’s probably 美. The way that it leads the strokes from 王 into 大 is so satisfying.
最、事、and 戦 are nice as well.