you don't need an art degree.
styles will help you a lot in terms of selling.
going from this to this is a large jump in style. often you can't just make anything in a whim, unless you have someone in mind. how many will want an image of a guy squeezing a bird? or a picture of the joker holding a lighter? i guess that's what that is.
jumping around like this just makes finding people that might like your stuff much harder to find. i'm not getting the emotion angle from these either. the joker has too much text, in the description, i would remove the quotes it has font issues and looks odd there. the feature i would remove, it adds clutter. there is a bunch of info about the actor, but how many want this for their walls?
then you jump right to a dog, which is cute, and i can see selling. however it has a questionable title that has a double meaning. and there are no tags. i wouldn't call this playboy, because people think of naked people surrounded by very informative articles. instead i would highlight that its a pilot, and find a catchy name for it. add the right words and a description. these can't be ignored.
this has a chance of selling, though i would add a sunset orange background. a description is needed, more keywords.
style wise i think you should stick with silhouettes. however this one isn't even for sale, has no tags and has printing issues. i don't really see how that's a camera though.
you have a cropping issue on the top, too many dots in the description - and there are no tags.
looking over everything i think yes, this type of thing is your style and you should make more like this, forget the rest. they are far too random. this need a crop fix and again you have not tags or description. no one will find you .
i would remove the photos though, they don't add enough, and are suddenly there. its like when a cartoon has a real person in it. its hard to say who would want this, a lamp coming out of the truck and all. a description and better words would be nice.
if you can get a better angle of this, and make it sharp - as this won't print ever, you could get something from it. patterns and color, try to make it all that one thing without background.
anyway, you have to market these and if you make it as random as you are, it will be hard to do so. you have to imagine what room in your house these would hang in. and if you can't then it will be hard to market. you have many missing tags and descriptions and this is what people use to find you. find your style and stick to it. the ones i pointed out, do a series of those. and keep the things in it specific to a person. so you can market it to that type of person (fishing, hunting etc)
---Mike Savad
MikeSavad.com