Amoreho, I am not "picking", as some might think. It's just that when you are out shooting pix, every shot is not a "winner", once you get them developed. If it's dark and cloudy, consider shooting another day. Same goes for any low light situations, unless you have the film, camera and the skills, to shoot in those situations. If you can see the sun, while aiming at your subject, also not a great idea. It should be, at the very least, overhead, but prefferably behind you. Is the subject so far away, you can't identify it? That headlite shot, while interesting to you, probably means nothing, to the rest of us. Spend some time, in the "photography" forum, here at RR.net, and read some of the posts, about what works and what doesn't. Like I said, we have all been there, and I have hundreds of dark, blurry, grainy, backlit, off-centered photos, around here somewhere.
Shots with people in them, poles sticking up out of loco roofs, telephone pole blocking the shot, etc., all need reconsideration. While an overview of an entire scene can be interesting, trying to capture a rare loco, and getting everyone around, and all the cars, buildings, etc., all detract from your subject, which according to the title of the picture, is a certain locomotive. It all comes with practice, and you have to really sit back, and decide, if a loco that is so dark, you can't read the name, or number from, is really needed in an album, you want people to view. I even recall, some time ago, a book in print, specifically aimed at railroad photography. You might try to snag a copy, and check it out........
Keep on trying, and don't let this little bit of critique get you down. We ALL came up, from the bottom...........