I use use steemit as primary interface and secondary is busy. I use busy for only posting my article and for writing sometimes.
I perfer using steemit and the reason is 3rd party application like steemit more, steemit plus work great with steemit.com
I love steemit drafting too but still i like busy as my primary option for posting article.
Delive, dtube, steepshot etc are for only there specific features. I am not using any of them right now but will consider using in future.