that tree isnt even bad

!
it just depends at what angle its supposed to be...is it supposed to be iso? then you need to change the trunk ;p thats all
i revently made a tree too again, i love doing trees XD
but i can give you a really important advice, never mirror the sides <.<
keep it as unique as possible

as you can see i didnt really finish the treetop XD but thats ok :3!
trunks are always a bitch XD because you have to make them look plastic, not just like a piece of paper which is the case of your trunk, theres lighting missing :O! and maybe put more effort in the wood-texture :p!