I love front end because I enjoy UI/UX and I generally prefer to work in large, complex applications. If I can have both, I’m good, and I’ve been fortunate enough to be working on large, interesting projects.
BUT, no matter what, I go in cycles of loving it and trying to learn as much as possible, then sometimes I stop giving a shit and spend my free time on the couch instead of learning or doing side projects.
I don’t really know the point of this comment. I guess that, for me, at least, interest waxes and wanes. I just try to accept it and do whatever feels good at the moment. I don’t really have any good advice, but how you find someone you enjoy (at least some of the time).