[Serious] Generally speaking, is philosophy a worthwhile subject of study?

[Angrboda]

It depends.

If you have some goal in mind that might benefit, of course. Studying logic is useful for many things, and understanding some of the philosophical issues regarding science may be useful to a science major.

However if you're just studying it for personal enrichment, I'd say it's no more nor less worthwhile than anything else. It doesn't lend itself to a lot of direct application, so it's not a necessary complement to a liberal arts education.

Of course it depends on what you mean by philosophy. Logic and critical thinking, both useful, aren't ordinarily included under that rubric.