It's fairly subjective.
Some people argue that the traditional subjects - maths, sciences, English lit, foreign languages, history - are much 'stronger' and more respected. The 'weaker' subjects would be considered art, sociology, English language, philosophy, media studies, possibly even psychology. But the people who actually do these subjects would probably vouch for how hard these can be.
If you want to go into any of these 'weak' subjects, it would be silly to take all sciences and maths which have nothing to do with that course.
I think the problem lies in that it is argued it is much easier to get an A in Media Studies than, say, chemistry, yet it is still regarded as an A Level. But as I said, it depends on the person.
There's no point picking a load of subjects that you don't want to do, as you won't enjoy them and subsequently will not do as well. Do what you want to do, but there's no harm mixing certain subjects with 'stronger' ones just to make you more appealing to employers.
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