I have dissociative amnesia, so probably not the best to be answering this, but from speaking to others on the higher end of the spectrum:
Seem to have a better long-term memory, particularly with regards to remembering facts surrounding a special interest, but with pretty poor short-term memory.

I myself can't remember to feed myself, or what I've heard, but remember exactly what I read if it's in 'mirror writing', and around 92% when written normally - improves when moving around while reading as I am a kinaesthetic learner. I remember images perfectly but without colour, and I remember the individual digits in long numbers but cannot recall the order they go in. My memory works backwards, hence the mirror writing, but am also capable of speed reading (over 2000wpm) with text reversed in this way and often start from the bottom of the page which helps me to recall it in the intended order.

My episodic memory is abysmal, but I can remember unrelated things fine. I'm great at memory storage with regards to factual information.