I'm actually really curious because i realize it's a pretty mixed balance when I asked chat. So vote!
I'm not sure. I think I use both depending on why I want to teleport to my island. For example, if I need items quickly, I type /is to get there a bit faster. But when I'm not bothered, I tend to use /home. It's weird. I'm weird.
I started using /is just because it was shorter, but now it has become a habit for me. I rarely use /home.
Honestly, for the first 3 years or so that I was here, I didn't even know about /home. I had always used /is before, and I still use /is.
when there was a cooldown before you teleported, way back when, I would use /home. I then realized that /is was a command and started using it because speed was of great importance if I fell of my island. I came back to skyblock a few months ago and had completely forgot about /home
I used to use home, however when I started playing MV survival, I started using /is for skyblock instead.
But what if I'm an "/island" person? :c jk I like to do/is, it's good for when you fall off or when you wanna leave mob warps fast before you die.
Back when i was new I used /island to go home without knowing you could do /is for short. Then I found out about /home and since it was shorter I went with it. I then discovered /is but was so used to /home i never switched.
I use /home because it's my home. Feels a lot nicer and cozier than /is, and I don't usually have to worry about dying in the void nowadays.