Its not at all shabby. Some very good pics, particularly your main picture.
Your port exemplifies my reservations about large tattoos. There are many ports here which are pictures of pictures on people. The more pictures people have of their pictures, the more pictures they amass. You end up with pictures of someone else's artwork in the same way as if you photographed graffiti or the inside of the Tate. Sometimes it works well and becomes part of a balanced image but most often, to my eye, large tattoos dominate the image to the detriment of the subject wearing them. Just my opinion, and that's this evening - tomorrow I might love 'em.
On that basis, I like the one in the leather jacket.
you have some nice photos
your main image is very well composed and shows you off quite nicely
only thing i would say is maybe get some outdoor shoots find a nice tog to do a location shoot to add to your portfiolo also maybe some floor work or group work with a female.
but thats just my opinion as i think these may give you more of an rounded portfiolo showing you in different aspects such as natural lighting as to studio lighting
i live in peterborough if you ever wanna do a shoot let me know as need a male model shoot for my portfiolo