well stratos,

there are some certain rules to follow when designing a t-shirt.

One that you have seriously crossed is using gradient. Your T-shirt might appear nice in that colour but if you were to print it the cost would be extremely high (that and that you have so many colours on 1 shirt).

Its not realistic, hence you dont see many gradient graphic shirts.

T-shirt graphics are usually flat and if are not, they should be too complicated.

Overall you really need to step back and have a look at your design, from the following i can see:

a) it has 2 many colours
b) much to complicated with 2 much designs.
c) it looks more like a graphic print design than a t-shirt design
d) I dont see it as a shirt that people would wear.

Try to keep your t-shirt design simple 1st and to usually not more than 3 colours.

What looks nice as a print might not look nice on a tee.

Actually i dont think he should go to threadless, no offence meant to anyone, but alot of people who go to these sites to get 'inspired' end up referencing too much if u know what i mean. Let your designs and ideas be your own.

So far your designs are ok startros. Just cut down on your designs, as said earlier, far 2 complicated. You need to learn about design space and also look in magazines. Fuse your style with what is sellable, I'm not saying follow trends now, create your own trend but dont copy.

Cheers and enjoy!