@romero, I like the style of that nove, its got nice flow to it..
@torch, I like how that 'Dios' piece came out the best... its got a nice style, nice fill and the 3d shading bars look on point.. id work around that style some more..
In the "Future" piece, your lines get reallllllly shaky and it came out inconsistent, the 1st 'U' is completely cramped and looks completely out of place.. work to try and make all your letters a consistent size throughout the entire word and it will really improve the outcome..
The 3d shading lines in that piece are inconsistent as well.. you want to try and stay tight and clean with those - keep them all going the same direction.. rushing small details like 3D shading can really ruin a piece..
As for the other stuff, im not really sure whats going on..
but keep practicing. Focus on staying consistent throughout your work.. you dont want to do 80% of a piece and get lazy and sloppy on shading and details, it can ruin the work .. something ive learned from experience... when I start to get lazy or want to just finish, that means its time to put down the pen and come back to it tomorrow with a clear head and new focus