As @Danand @Hogridermentioned, the quality of these tattoos is subpar. They look like they are by an apprentice, i.e., someone very new to tattooing. Just look for a better artist to get more work. Let us know where you are and maybe we can help.
As for your original question—no, they don't look particularly cohesive. But I'm covered in lots of tattoos that don't really go together, but my artist (the guy who has done 99% of my work) finds ways to tie them all together. Just work on getting better work done. Good luck!