I used to do a lot of web design back in ~2004-2008 before i became a developer, and while i like that the web nowadays is more accessible the design of today lacks individuality.The brand design is more shaped by the choice of colors and fonts imho.
> Overlapping images is a great way to add depth to an interface and make it look more “designed”.
I don't know if this is sarcasm. No one is asking why do we need to add "depth"? What problem is "depth" of overlapping icons solving?
I would stay away from this.
Many people interpret quality of design as an indicator of content or product quality.
To address your particular question, depth creates a more realistic and visually interesting representation of information on a screen. It can also serve to indicate the priority of information on a page. If depth draws your eye to or away from a particular element, it can help to achieve the designer's goals.
I am just speaking my mind, what kind of things prevent me from trusting others despite of their benevolent intentions. Time and again, I've been bitten by bad subjective advice - there is a lot of bullshit out there. Tread carefully, adopt what makes sense to you and ignore others unless evidence shows otherwise. That said, there are a lot of gems out there as well.
If the thing I am making is art and is subjective, then why can't I just be original? If a particular activity is totally arbitrary, then all bets are off.
Blindly following advice is why we as a society get stuck in a local optimum and don't try other things. Domain exploration and experimention, originality and authenticity are paramount to getting out of the local optima. Every once in a while someone does and they revolutionize the world.
Anyone who can draw knows what that means.
They sell a (rather expensive) book on web/mobile app design that explains how to build your design system and use it to create great looking apps. They cover all the bases you would expect like fonts, line-heights, colors, shadows, borders, sizing, working with images, visual hierarchy, using white space, etc. etc.
I'm a developer by trade and I work primarily with one other developer, so we end up doing all of our design work. This book really helped us step up our game and gave us some very simple tactics to use to improve our designs. Imho, it was well worth the price.
https://refactoringui.com