I voted for the @noisy's witness account immediately when I heard about it. I have a similar opinion to his activity as you. Moreover, I know his activity in the Polish community. For this community (and not only for it) is a good role model. Personally he taught me a lot, and after meeting him I began to look at Steemit completely differently than before.

The same opinion I share with you about Busy. Where there is strong competition, the level of service is growing. @Fabien and the whole Busy team are doing a great job.

Other witnesses, I confess, I do not know much. In my defense, however, I have to say that I am still "a newcomer" to Steem blockchain and I am constantly learning. For now, I only voted for witnesses, where I became acquainted with their work and contribution to the community.