James and the Dark Arts.

[rach9112000]

No: HPFGUIDX 91012

I've just been reading OOtP for about the 5th time and I found 
something about James which hadn't previously jumped out at me. It's 
in Chapter 29 (US Version pg 670) and its where Harry uses 
Umbridge's fire to speak to Sirius about his dad's behaviour towards 
Snape in the Pensieve scene. 

Sirius says "And Snape was just this little oddball who was up to 
his eyes in the Dark Arts and James - whatever else he may have 
appeared to you, Harry - always hated the Dark Arts."

My question is, why did James hate the DA so much? I can't believe 
it's simply because he found the subject difficult because we know 
James was very intelligent. 
If anyone knows any canon for why he hates the DA please let me know 
because it would appear he hated the DA prior to the war on 
Voldemort. 
Thanks
Rachel