Aidan,
If this was a dog site, then 3 pictures of your dog would be fine because dog lovers would just be happy to see more.
This is a photography site and we are interested in pictures rather than the subject.
You should look at your pictures, figure out which one you think is the best and why
as a photograph.
Then the comments will help you be a better photographer.
The most 'powerful' places in a picture are generally at the junction of the thirds. This 'rule' doesn't really count for portrait where the main subject can dominate the center but needs to be considered.
Look at this picture.
The only interesting parts, the center of interest is in the top left part of the picture and the top right corner is essentially empty.
Not only is in empty but it is the brightest part of the picture, thus drawing the viewers' eye.
I understand the problem with posing essentially horizontal subjects - but that
is the photographers' problem to make a good photograph