My first go at making my own collection of custom trees.
In total, there are 15 trees + their snow variant without the grass.

After this, I'll probably start building the oak or birch trees.
My end goal will be to have 15 different kinds of custom trees for every type of tree that exists in Minecraft.

And as usual, they're free to download and use (just don't claim them as yours when asked and such)!