Since sparring and pattern performance require different skills, some people are good at one and not too good at the other, while some are good at both. In addition, some people may enjoy one, but not the other.
If you enjoy pattern training, that is good; if you do not, then pattern training will just be one of those things you must endue so you can keep doing what you really enjoy. Even if you do not enjoy pattern training, it will still help your sparring.
I do not particularly enjoy patterns, but there are times when I enjoy them more, and I can definitely see an improvement in my overall skills when I spend more time practicing them. Patterns are like the family dog; no matter how much you dislike it, if you keep it around and feed it, it will still come to your assistance when you need it.