I like memorizing things
I like to be able to recite things whenever and wherever, without relying on a piece of paper to remind me.
As a Linguistics major (and a linguaphile) I knew I wouldn't be able to resist memorizing a few sutras in Sanskrit. I used a technique I needed for something a few months ago and managed to get the Heart Sutra down in about a day. If you look for the right tools it should make memorizing a lot easier
But again! You have to think if it's something that's important for you. If you're finding it difficult reading it in one language while hearing it in another, then memorizing might take some of that difficulty away. But it'll be difficult getting to that point too perhaps.
Like another poster said , if you listen to things over and over, some parts of them you start to memorize naturally. I'd give it a try with the Heart sutra and see how it works for you! ^^