I fear death in the sense that there are still things I want to do and experience in this life and I don't know if I will be able to do them before I die as I don't know when I will die. That concept has started to bother me over the past few years.
Apart from that, death would be a release from this weird reality I happen to find myself in.
I didn't exist for billions of years, suddenly develop a consciousness and discover that I'm apparently a "human being" (a greatly flawed creature) living on a strange planet called "Earth" in a massive "Universe" which has certain physical properties such as "gravity", "mass" and "electrons" etc.
Humans aren't a very advanced life form if you think about it. So much potential misery and suffering. Hard to bring new children into this world knowing this.