I’ve had a Mastodon account since 2018, but I officially moved from twitter last year. I also have a firefish/calckey account and and akkoma one.
I prefer Firefish. Its features allow me to use it as a mix of twitter and tumblr. For something extrictly twitter-like, I’ll go for Akkoma as I find Mastodon to be lacking some important characteristics and its minimalistic design to be uninviting.