In splatoon 2 and the beginning of 3, i mained bamboozler bc it seemed both interesting and highly skillful. Unfortunately current kit isnt nearly as fun or interesting as mk2 was back in s2, which i think is the best main special combo in the games history.
I mained pencil since around it came out, i just find it very interesting as a sort of charger splatling hybrid. And tbh i picked it up out of spite, to prove that you should run rsu on it, not special spam (pre cooler meta)
But through both of those, ive mained mini splatling, either as my secondary or primary. I licked it up in s2 bc i found it felt similar to bamboo and i was suprisingly competent with it, but its kits were never super interesting. Now in s3 that ive dropped bamboo and mini has stamp, its my most used weapon by a long shot. High skill ceiling, and very capable at holding its ground in aggressive positions, and has a special that gives it a whole new weapon to do what the main cant, just what i like.