haha, thanks Anther - I agree; not spamming with pikachu is like not using falco's lasers in melee...
sadly, part of the reason why I'm not a pikachu main anymore (he still is my best character though) is that he is so... not aggressive (not that he camps, but you have to be really patient to play pikachu well...) Smash should be my entertainment, and pikachu's patient, wait for the opponent to mess up style really is quite tiring... I'd much rather charge in spamming G&W's bair or MK's fair... less thought required.
BTW, something useful - I've been looking at full hopped bair with Pikachu, and it's actually very, very good. Super high priority and great against people coming down on you from above. I'm not sure if it out-prioritizes G&W's key, but it catches people in the air very, very well and has no landing lag, so its hard to punish. The only thing bad about it is that you lag if you try to do it after a QAC...
Also, people just want to see QAC because its flashy. You only really need it to run away from people pressuring you, and maybe throw in a QAC -> thunder after a dsmash. That's the most success I have with it. Sometimes, I'll QAC under them if they full hop too much (which, because I spam so much, they do), but usually, its not really that successful.