いろいろ考えてみると私の主観ですが、プレゼントはどれだけ気持ちがこめられているかで価値がかわってくるのだと思います。

All things considered, and it's just my opinion but, I think that the value of a present changes depending on how much thought is put into it.

彼の文章はとても主観的だ。

His writing is very subjective.