You say youve been writing for a year

?
1) You shulda learned somthing bout letter structure. yours was incredibly choppy and ill suited to what youd probably like.
2) Width - it varys so much id compare it to mixing spaghetti with macaroni and hoping somthing comes out. Seriously, look for consistency
3) Connection and their non existence. Either your connections are attempting to be too compicated or they dont exist at all.
4) Your colors were either not there or horribly done. A quick tip: black does not go with blue.
5) Your perspective drwaing sucks as well, try keeping everything at one angle.
I could butcher your pictures longer (and its all true), but im running outta comp time so im gonna write up the 101 quick
------------------Graffiti Tips and tricks----------------
Coloring:
the first and most important rule of coloring is that shuld you have black or white in your picture you dont want something thatll compare to it but rather contrast. "Natural" tones (green, tan, brown, grey, etc) almost always go together quite well. Primary colors almost always look awful together. Refran from using extra bright colors (highlighter shades). However, with All this in mind the worst thing you can do is bleed your markers. Do not concentrate your color to one area or go over a place too often or itll look inconsistent
I would write more but my times running out. Hope that helps. Peace
_murda