I've recently made the decision to focus primarily on supporting development oriented Witnesses with my Witness-Approval.
I believe that developers are crucial for the success of Steem. Without them, we wouldn't have a blockchain in the first place - in addition to all these great apps on top of it (dtube, dlive, utopian etc.) and I'm not even talking about the possibilities through SMTs.
Additionally, while Steem has its strengths - other blockchain projects like EOS, NEO, Nano, Ethereum & the whole blockchain-sphere are developing so fast, that Steem needs constant improvement.
We do have a motivated and skilled team with Steemt Inc. who is - as 
But I also believe that Witnesses have a great incentive to be valuable contributing developers for Steem as they get rewarded with Steempower for running a witness-node - and depending on how valuable their input is for Steem: the more votes they will receive. (technically)
Smartsteem Proxy
I've also decided to use 
You can of course also choose me as a witness-proxy (https://steemit.com/~witnesses) and I'll make sure to vote on witnesses to the best of my knowledge & belief .
Witness List
I currently vote for 26 Witnesses - of which roughly 80-85% are developers.
| Witness | Developer | Reason |
|---|---|---|
| @therealwolf | Developer | Developer of Smartsteem.com & Steem Messenger |
 @jesta | Developer | Experienced developer & witness who has created Vessel (Steem Wallet), chainbb, steemdb.com and is currently focusing on Vessel 2.0 (afaik) |
 @gtg | Developer | Very experienced Witness - running 2 RPC Nodes |
 @someguy123 | Developer | Very experienced Witness and also the CEO of  @privex - the greatest hosting-company that accepts cryptocurrency - runs 1 RPC Node |
 @thecryptodrive | Experienced witness and a very smart business person - owns 1 RPC Node | |
 @netuoso | Developer | Experienced witness, SteemDevs founder & decentmemes.com developer - owns 1 RPC Node |
 @smooth.witness | ? | Very experienced witness |
 @pharesim | Developer | Experienced witness & developer of steemdice - runs 1 RPC Node |
 @lukestokes.mhth | Partly | Very experienced witness |
 @followbtcnews | Developer | Experienced witness that runs steem.chat and steemtipper.com - owns 1 RPC Node |
 @blocktrades | Developer | Very experienced witness & developer - owns and developed blocktrades.us |
 @xeldal | ? | Very experienced witness (and also the witness with the most produced blocks) |
 @riverhead | Developer | Very experienced witness and former developer and owner of steem.chat |
 @utopian-io | Developer | One of the greatest apps on Steem that also pays developers working on Open Source projects. |
 @teamsteem | Great community witness | |
 @yabapmatt | Developer | Experienced Developer |
 @blockbrothers | Developer | Team of multiple Steem-users - creators of Steemify (mobile app) |
 @reggaemuffin | Developer | Experienced developer & witness - developer of minnowbooster |
 @themarkymark | Developer | Wizard of Python - runs 1 RPC Node |
 @nextgencrypto | Witness who is doing things differently | |
 @steemhq.witness | Developer | Interesting witness project - owner is a good developer |
 @dragosroua | developer | Great community & developer witness - one of the few people I'm following who posts often and good |
 @asbear | Developer | Great and motivated developer |
 @swisswitness | Partly | New community witness consisting of 3 steemians |
 @stoodkev | Developer | Great developer - developed the steem.plus extension |
 @samrg472 | Developer | Very smart developer - developed steemdunk |
 @felixxx | ? | Experienced Witness |
 @mahdiyari | Developer | Great Witness who is running two projects on Steem and is also notifying witnesses if they missed any blocks on steem.chat |
If there is invalid or outdated info - then please let me know and I'll edit it.
Share a Witness
If you know a great developer witness who deserves an approval-vote, then please let me know with a comment below.