It depends
If you want a huge number of follower then upvote more posts with a little bit of your voting power.
If you are not wanting that and only upvote the content that you like then going though a higher voting power is good.
Overall I prefer to vote using high power.
(I can't choose my voting strength, I am suggesting for those who can)
On the eSteem app and on busy.org you should be able to use the vote slider. Good luck!
Let me try my friend !