I mean this:
Also please don't ignore replies which are directed at how your posts are perceived (Carnivac's last post)
Don't know what you mean.
You should study form and value more and stop using techniques that serve to mask your ability to discern for yourself how to create something.
I'm starting to get quite offended by your tone here.
About the aa again:
In most cases older hardware would have 16 colour sprites. One reserved for trans, so 15.
This allows for quite a few setups still in terms of ramps.
The thing is that a) usually it is unwise to have mixed ramps if you plan to do a lot of colourswapping (esp. under time restraints) and b) you want to use all your colours for your ramps and not reserve some colours for just aa between the combos you do.
If you did that and had special aa colours for each of the combos possible then you would be fine, but this was not the case on old hardware, and even today would increase the workload by an unreasonable amount.
As I said, depending on how you manage your colours you can still do aa and colourswap and it will look ok in most cases. Like in SF2 where everything is relatively washed out and there are not too many super saturated colours.
What rikfuzz said still stands and is valid. This is not soley a colour or an aa issue, but it is a combination. And eliminating the aa makes your life a lot easier in this case.