With all due respect, you didn't really answer my question of "why do you want to do neuroscience". If you were to use your first sentence there in, say, a personal statement, it wouldn't be effective at all in convincing anyone that you were interested in the subject. I'll give you my own reason for wanting to pursue a career in neuroscience research as an example. When I was roughly your age (which is a worryingly long time ago now
) I volunteered in a care home, and pretty much every patient I saw had some form of neurological disorder (stoke, dementia, Parkinson's disease, etc). When I researched them later I realised how little we knew about what causes some of these diseases, or how to effectively treat them. This sparked my interest led me to where I am now, researching new treatments for ALS.
It's not essential that you have some moment like this that you can use in your Personal statement, but often the people that answer my original question with their motivation to study, instead of just stating they have some motivation to study, tend to be more successful in their applications.
Saying you "love everything about" neuroscience also isn't the best thing for me to hear-as a neuroscientist, I can tell you I don't love everything about it! I could barely describe to you much of what a bioinformatician or computational neuroscientist does, unless it has some significant overlap with my specialty area, molecular neuroscience. This suggests to me (and correct me if I'm wrong) that you may be in the early stages of interest in the subject and may not have found a few specific areas that interest you more deeply.
Careers wise, I'd say the most "obvious" career a neuroscience degree could prepare you for is to research neuroscience in a lab or similar setting, either at a university or in industry (e.g. pharmaceutical company). Given how competitive this is (I can tell you first hand-VERY) most people would opt for other career paths. This is the reason I ask, I've seen a lot of people recently in their 2nd/3rd year who realise they don't even know what they want to do with their neuroscience degree and don't know what options exist for them. As I said, by no means do you have to know exactly what you want to do, but having some idea of what options exist certainly helps with the decision of "is this degree even worth doing". Personally, I wouldn't do a degree if I didn't plan to use it for at least some of my career-there just doesn't seem much point to me