Those barrels seem about 20% too tall and lanky to me But overall the texture seems to fit them quite nicely. Lots of room for improvement though, so brace yourself. Critique hurts, but can really help set you on your way...so lets go!
- First a sweet cherry: learn from the masters via this perfect step-by-step tutorial that seems tailor-made for you
http://gimaldinov.deviantart.com/art/How-to-draw-wooden-plank-267517599?q=gallery%3AGimaldinov%2F32009074&qo=4
Okay, now the pain train, you ready?
Things lacking in your texture, just the painting side:
Color side of things isn't that bad, core advice in this area has already been mentioned:
- Vary color. Shadows can go into red, while highlights will be yellow even bordering on green. How much you vary it depends on your desired look (realistic vs. exaggerated). Use reference not to go overboard when simulating light.
- You're forgetting occlusion shadows - edge slopes on the planks should get darker closer to the gap between planks. Highlights can stay on the highest point of that slope and on the boards' flat surface, ofcourse.
Composition is lacking, here's a run down:
- Your lines have no rhythm. Wood lines weave and flow, like music. You can practice by just copying the wood patterns from reference, even with a pencil.
- Too much repetition (bad economy). There's just too many deep aggressive lines carved into the wood. It creates noise.
- Not enough variety - and this applies to a lot of areas: Your lines need to change thickness and depth (how deep they go into the wood).You need more kinds of wood "damage" - I see basically two types on your texture. Have four-six and use them less. Wood can have shallow chips, splinters that haven't quite fallen off, many, many kinds of damge.
Your woods' surface has only three states: normal, deep cuts and rough edges. Wood can do so much more, it can have darker and lighter lines, spots, have subtle smooth varieties in surface depth. Search for variety and use it, but remember about economy. There should be "just enough" elements to make a convincing board. No more, no less. No mathematical formula here, just gut feeling and hours of practice.
Planks silhouette is rectangular. Serious no-no - the shapes need to be more organic. It should also be chipped and ragged in places in a variety of ways (not too much! Economy!).
Whew...made it this far? Okay. To take the edge off, here's a hamster eating a tiny pizza:
You deserve it after three posts of non-stop bashing
One of the things you've got going for you is that the texture feels "even" - no particular spots stand out. Good for seamless textures and background objects that don't want to attract attention. Making textures behave like that is actually a skill!
Hope this helps even a bit, have a good day and keep at it!