Some people do eventually get used to the taste of seltzer water while other people may never get used to the taste of seltzer water.
In the office I work at I have a coworker that sits a few desks down from me and she loves seltzer water and drinks 2 bottles of seltzer water per day.
At first she didn't like the taste of seltzer water but eventually after a few months of drinking the seltzer water she got used to the taste of the seltzer water and now she enjoys is.
As for me I never got used to the taste of seltzer water even though I sometimes drink it when I'm suffering from indigestion or have a stomach ache or the stomach flu.
But I would never drink seltzer water everyday because I find it tastes bad but it is worth getting it down my throat for the healing effects that seltzer water has on me.