You've picked some good ones here! I think especially blocktrades and utopian-io really add a lot to the ecosystem with their conversion and opensouce rewards platform, repectively. Witnesses have an important place here, and its good that you continue to think about who to support, and who supports us!

I would like to recommend first @steemgigs, this is the witness for @surpassinggoogle, inventer and curator of the #ulog! Interesting story, 2 or a bit more years ago,he and 7 others in developing countries were given a large delegation by @ned to promote steem in their areas. It was discovered later that the other 7 had devolved to vote selling, and only surpassinggoogle had done and continues to do what he was charged with, integrating new users into the steem community. He is the only one who retains the delegation, the others saw theirs removed.

As @josediccus mentioned, @curie is a great community witness, it is a witness team of content curators that have done a lot for engagement within the community.

I also like to support @enginewitty, @jackmiller, @guiltyparties and @c0ff33a as fantastic community driven witnesses. These are the kind of guys you can talk to when you have a problem, witnesses that respond to chat and work really hard to make this place 'liveable'.

I vote for 30 in total, and so I could go on with a few more good ones at least, but I feel most passionately about these. Most witnesses do their best to run the blocks, but a great witness goes above and beyond to make this community a place we want to be!

Cheers! I'm buying the dip!