Hi Ronald, thanks for your message, I've had a quick look at your online portfolio.
Whilst we don't want the forum to become a one-to-one 'free-advice for photographers' service, we do want to open up dialog about the creative process, so this might be an opportunity to start a discussion across the forum.
It's difficult to tell you any single thing about improving your work. Obviously it can be improved as it lacks any originality or a personal signature. Much of it looks like stock library photography.
I see a lot of work by photographers who begin by trying to make their work look credible in emulating the proffessional photography they see around them. When they begin they can't light and take a decent photo to save their lives. When their work reaches the commercially acceptable level that is big step, but actually most of the well lit, correctly exposed imagery we see around us is just bland wallpaper. If you want to be at the cutting edge, then you need the courage to ignore everything around you and decide yourself what is a great photograph.
On the other hand, you seem technically able and clearly you can take a good photo. You're not going to make into photographic history books, but then maybe that's not your aim and in a highly competative industry you can be considered to be successful if you can earn a living from it.
What do you feel is lacking in your work? Where do you want to go with it? Who's work inspires you that you wish you were like?
I've stated my case, does anyone else out there have an experience, or opinion about Ronalds work?