Pudge is a very laid-back (and decently independent cat.
She doesn't claw furniture. Just my legs when she gets overexcited occasionally (every once in a while when I come home from work, for example). It is only when I wear jeans. She's figured out that they're not my skin, and appears to be trial-and-erroring a way to use them as scratching posts without hurting me.
If I say "ow" (which I do whether or not I actually feel claw. I usually only feel the very tips of them, painlessly. She's perfected it well, but she doesn't need to be reinforced in that behavior) , she stops and looks at me, then rubs around my legs, purring.
I just put a little more catnip on her cat tree and put her on it. She understands, and scratches the tree vigorously every time this is done.
Overall, she is a very good cat, in my book. I honestly do not even consider the above a behavior problem. She just gets overexcited sometimes. The aforementioned scratching is usually preceded by a lot of happy meows, purring, headbutts, and petting.