Start Question 1 with a clear reason for choosing the course or subject. A precise idea, academic experience or relevant observation will usually give you a stronger opening than a quotation, a childhood story or a claim that you are passionate.
UCAS Question 1 asks: “Why do you want to study this course or subject?” Your response appears beneath that question, so you don't need a traditional essay introduction. You can begin with the answer.
Choose a reason that belongs specifically to the subject. “From a young age, I have always been passionate about helping people, which is why I want to study Medicine” gives no sense of why the applicant has chosen Medicine rather than another caring profession. A more useful opening would be:
I want to study Medicine because I am interested in how scientific understanding informs clinical decisions and patient care.
This identifies a course-specific interest without trying to squeeze the applicant's whole motivation into the first sentence.
Words such as “passionate” aren't forbidden, but they can't make a general reason more convincing. If your draft relies on them, the guide to showing enthusiasm without saying “I am passionate” will help you replace the claim with something drawn from your own engagement with the subject.
An opening quotation has a different weakness. It spends characters on somebody else's words, then requires you to explain what the quotation has to do with your application. Start with the point you would have made about it.
The full guide to UCAS Personal Statement Question 1 covers how to develop your motivation across the complete answer.
Begin with the part of the subject that interests you
You can name the course directly, as the Medicine example does, but you don't have to begin with the formula “I want to study”. A History applicant could start from a problem inside the discipline:
Conflicting accounts of the same event drew me towards History, particularly the way evidence and interpretation shape what later generations accept as fact.
An Engineering applicant whose interest grew through practical work might write:
Building and testing a bridge model made me curious about the decisions engineers make when mathematical models meet the limits of real materials.
If your course choices have related but different titles, don't name one exact degree in the opening unless it describes them all. Refer to the field or question they share, while keeping the answer relevant to every course on your application.
When personal experience belongs in the opening
An experience can provide the first sentence when it has affected how you understand the course. A Nursing applicant might write:
Volunteering in a care home made me more aware of how communication affects a person's experience of care, and it led me to look more closely at the work of nurses.
The applicant has explained what they noticed and connected it to Nursing. A detailed account of the care home, the relative who inspired them or the age at which they first wanted to become a nurse would take space without clarifying their current reasons for applying.
Personal circumstances may genuinely have shaped your subject choice, and you don't need to conceal them. Keep the background that helps the reader understand your motivation, then bring the focus back to the course.
Settle the first sentence after you have drafted Question 1
Trying to perfect the opening before you know what follows can leave you stuck on a sentence that you later delete. Draft the substance of Question 1 first if that is easier. Once you can see which interest or experience carries the most weight, you will know what the opening needs to introduce.
Read the opening with the next paragraph rather than judging it in isolation. A first sentence that is much grander or more formal than the rest of your answer will feel awkward even if it is grammatically sound. Remove any general preamble and use the same clear voice as the rest of the draft. The wider guide to editing and proofreading your personal statement without losing your voice can help with the remaining revision.