You can check out who is posting what with the relative tags: witness, witness-update or witness-category at
https://steemit.com/@witnesspage
and you can see the general info for all witnesses at:
https://www.steemian.info/witnesses
Your vote is your personal choice and what is important is that if at any time in the future you feel that you wish to change your vote, you have absolutely every right to do so and nobody has any right to judge you for it.
Your vote = your choice.
& there is no rush to make any choices either, it is all a thing of what you decide to do with your votes.
Cheers.