For me - looking at concept art is all about looking at the ideas. Clearly when the concept is translated into the in-game representation there will be a visual translation - freehand sketches get converted into meshes with shaders and lighting and animation - but the idea should be constant and translated faithfully.
I will also add that I actually find it quite hard to separate the visual drawing style used in the concepts from the ideas represented in the concepts. Sometimes I look at concepts and think they look super cool, but then I realise that it’s the styling of the concept that looks great, but the ideas behind them are boring.
We’re lucky that @claudiotolomei has a really great concept style. Interestingly I think @Minyi has adapted her personal style to more closely match what we already had - to try and make our development more about ideas that style. (Although @claudiotolomei and @Minyi might say this is totally rubbish!) Whereas @jesshyland has another style again - seen here.
I really love this concept sheet because it captures how a single germ of an idea can be expanded into a diverse spectrum of variations and then ultimately gameplay!