They all lack vibrancy. Try to get your colors to be brought out more and make sure your saturation levels are balanced. You have a lot of grey/lowly saturated areas in your tags which makes it really unappealing.
Avoid typography and drop borders, try making your smudge a bit more creative and work with different effects.
Blending seems okay, lighting needs a lot of work. Make sure you really bring it out in your tag, it's an important element.
Kiu ;3!