I don't think your use of filters creates any major problems in those photos. For most of the purposes you use a filter though, you can achieve a similar effect manipulating your photos in a software like Photoshop. For example, for bringing out colour, instead of a blanket saturation filter, I've taken to using the "selective colour" tool and bringing out the individual tones and shades I want to make it more personal to the image.
While we're on the topic of bus stops though, can I hijack this thread with my own pic of an abandoned bus top? :3
I didn't edit this one, so don't use this as an example of my advice in action.