Dude, I seriously fail to see how you could think you're not good at this o_o; Your latest work is great, and for the most part you have a nice grasp on color. The only slight issues I can see are that:
1) Although they look good, a lot of your tags look too similar. I know I said earlier to find your niche, but this is the sort of place people find themselves at after memorizing techniques from popular tutorials. A good style, but you feel like you see it everywhere, to the point where you can't tell it apart from the rest. When I see a Maly, Loki, Dukey, .moments, ezzo or whoever tag in someone else's sig, I know before even reading the credit, "That's definitely made by ____". I can't say that with some of your tags, because like I said earlier, it's a common style. I myself found myself stuck here for a long time as well, so don't take it as a bad thing xD. If you are truly comfortable with this style though, then simply expand on it. Smudge where you don't normally smudge. Throw in something random at the end and allow it to fit (not to be mistaken for force it to fit).
2) This isn't so much an issue as it is a recommendation. Heck, you might even already do this. Anyways, to the point: if the text in your work is not a purely stylistic choice, make an alternate version without it. A lot of good tags can potentially be bumped down a notch or two on the coolness-meter due to unneeded text (this applies to pretty much everyone who does gfx. god knows i've ruined lots of tags with my stubborn inclusion of text).
Those are really my only gripes, and they could easily be things unique to my preferences. Keep up the good work man, I'll be keeping an eye on your stuff.
PS - Your LP work is better than anything I can produce. Give me a large canvas and I completely flop.
It's just a matter of where to place them and what kind of text you want and such. n_n