I agree in some ways... I know that when I do detailed drawings, it gets ... more or less the same amount of, if not, LESS attention than my less-detailed drawings. It's insane. You know what happens, right? People see a picture, they say 'oh that's neat', and then they turn away. They don't have a clue the amount of effort and frustration that go into these things, and really, there's no realistic way to MAKE THEM understand that. There are plenty of artists here who can do in an hour what could take me anywhere from a week to three months to finish. The fans who have seen their art look at mine like 'why is yours any more special?' and it either gets regarded as the same one-hour-effort, or far less.
So like the others have said, just do what you find fun and entertaining for yourself. You can always get a few people here and there, hopefully, who will appreciate your hard work and effort regardless of whether it's an hour or a week or highly detailed. But I can definitely say from experience that being frustrated on a drawing and getting a great result will not always bring relief or satisfaction once it's done, because people just shrug it off sometimes as quickly as the rest of your not-as-detailed works.
For myself, I'll still attempt detailed drawings now and then because I find the challenge to be fun sometimes, and I like knowing that I've done just a little bit more improvement from the last time..... but when I finish a frustrating drawing, I don't feel good about it, and especially not when it gets all of one comment in the end. It's a weird balance for me, but I guess I'm used to it. The fact is I have projects that I want to complete, and I would like them to be of a certain quality, so even if they get less or 'the same' amount of attention, I still have the motivation sometimes to attempt a higher quality or try to beat my best just to get to the goals that I set for myself. But there are plenty of other times where I just want to sketch something real quick that would make me feel better. What usually determines what I do is usually a weary reminder that I've put off projects for too long, but occasionally I do something in-between to break things up anyway, and I think that's more healthy.
For you, maybe think of it as a favorite game you like to play often. Sometimes you just want to play and not care about the small things as long as you have fun, and then turn it off the moment you don't feel like doing it any more that day. Other times, you might remember your previous high-score, realize a few new methods that might give you even more score, and suddenly you have a motivation to make a high-score attempt. Those are the times when you'd try to draw something detailed, when you have the ideas and the motivation to attempt, even if it doesn't work or you come just-short, in the end it should still be a fun game that you still like to try now and then.
An artist named Scott McCloud has put the concept of art in this big triangle chart. One corner is realism, like a photograph of a face, one corner is where that face gets simplified to the kind of face you'd see on a stick figure, and the final is a load of abstract clusterfuck.
And here is the triangle showing where a lot of popular comic book characters fall in:[link]
I could tell you a very long story about my struggles and failures to become a professional artist, but I won't. Every artist has a place in that triangle. Some people want to step ahead towards realism (aka adding more details and such) because they want to be in that place, but some people also strive there because the creative industry (comics, animation and games) is very competitive, so everyone has to clutch their pencils and power up like super saiyans until their pencils snap just to stand a chance in that industry.
If you're a casual artist that just wants to enjoy what you do, don't bother with this stuff. Do what you love and watch what you love evolve in its own way. Every niche has its fans if you keep at it, and probably one of the biggest successes I've seen in internet art was this webcomic called "Order of the Stick" which is a stick figure comic that got over a million dollars in fan funding to get published as a book. [link]
Compared to tons of artists, my stuff is still very terrible, but I like what I do and discovered the wonderful world of indie publishing that lets me be myself.
I think a lot of casual artists will feel more confident in drawing if they stop caring about the competition and anal professionalism out there that they probably want no part of in the first place.
Art is not just how perfect you can imitate the real world in your head nor is it how standard you can draw a particular style. Art is also how one communicates their ideas and likes and simpler forms/styles communicate better from the artist to the viewer, especially if that's where the artist has a strong point at (thus, making it fun means of communication). A lot of people can disagree with this saying "You have to learn the rules before you can bend them" or "if you stick to your style, you'll never grow" but you can't just overcome every obstacle in existence when some or most of it will never be useful to you at all- that's overwhelming! In time, you will come across things you want to draw but don't know how but the fact that you have to do it to get this particular drawing done will motivate you to learn how to do it. There's your improvement right there, and each time you leap that hurdle, you get better.
Art, like people, evolves. Shin-chan isn't detailed, Garfield isn't detailed, Ed, Edd n' Eddy isn't detailed, and they are great works in their own right. In short, art is one's own vision, and whether it is detailed or not depends on the artist's vision. Should you decide to detail it or simplify your art is entirely your decision. Do what you feel is right, nothing less.