If you're a current smoker, dual user, or recent ex-smoker, then salt nicotine is probably the best option for you. This is because of the swift nicotine delivery and smoother throat hit. The benefits of nic salts for smokers are huge!
With salt nicotine, you can enjoy a much faster craving satisfaction and higher nicotine strengths with fewer puffs and without that sharp, harsh feeling on the throat.
But if you're a more advanced vaper or someone who isn't so dependent on nicotine anymore, the choice is really up to you.
You might find that you get just as much out of freebase liquids as you would with salt nic. Plus, with freebase, you have the option of lowering your nicotine strength all the way down to 3mg. You can even opt to switch to sub-ohm vaping, which will allow you to vape nicotine-free, if you want!