There is no way  I can judge the quality of your images without seeing a 100% crop.
the subjects are ok, but not striking, the colours are good. There are no concepts. Its the kind of pictures you upload on a dull month when you have nothing else.
You are still in the stage where you wander around with your camera and shoot what you find interesting. That will get you some pictures  accepted, but not many sales. You HAVE to think like a customer.

I'm hardly someone that can judge your stock portfolio as a photographer, so I won't comment with that perspective (the images seem good enough from the thumbnails to be accepted, and a %100 crop could tell us the whole story, like noise and sharpness).

BUT, past acceptance you might have a hard time selling some of them. I'm a full time designer with 15 years or so experience and have naturally bought tons of stock. I could use the first 6 for all kinds of things and they are sellers.

The latter ones are what I would use in a magazine for an article, and those articles have photos taken by photographers on site, I mean there's no sense in using stock photos about TOWN X

The contrast on them are too strong to alter and blend in a composition, so that's out too. Once in a blue moon I'll have the need for one of the last six photos and maybe consider buying one - but even that's a long shot.

Think of it like this ; the fishing nets. Let's say I'm designing a promo to encourage fishing supply sales, your images do not fit at all, they are moody and sad.

A general tourism bureau flyer? An empty road with a guy riding a bike, I'm not sure the client would want to emphasize on a solitary holiday trip.

They look really nice and do trigger personal memories for me, but I've always been bit of an introvert so there's that

I'm not trying to knock you down or anything, just trying to convey what a buyer looks for, so you don't have to build a portfolio of a 1000 photos and watch in dismay as your hard work gets ignored, even though they are perfectly fine images.

My %100 go to buy stock photo is this : Preferably with people, looking generally happy but not the "omgwtfOHYEA" look that gives it a fake vibe. If they're not even aware the camera is there, the better. Generally good looking but definitely not drop down gorgeous. A believable crop of everyday life of people doing XXX (where X is my design subject).

I hope this is of any use.

Good luck