Core and XT are virtually the same, other than the increased block size, and some fixes, so afaik there's no difference in mining.


Not exactly; if we assume that the fork actually happens, which means over 75% of the network is on XT fork, you would have to find a service/exchange that's on
original core version in order to spend core bitcoins, which i am certain operators will find a way to prevent.

Hello, you haven't understood right. There will be no free coins for the people running XT. Same balance you have in your core wallet for example, you will have in your XT wallet if you switch over. So don't let this thinking make you switch clients, thinking that you will get free coins, this will not happen.

With the 20MB per block limit, definetely the block reward halving of course.
That's the idea of why the limit per block is so high: it's a long term "fix".
But with 1MB there's chance to be a block that is fully filled before the halving.


Average isn't the max.
We can't wait to the Average to be 1MB. Even if the Average was 750KB it would be bad, it would be a signal that some blocks on critical times are being fully filled.

Satoshi built Bitcoin, the currency we all use and love.

He selected the supply cap, the inflation rate, the mining algorithm, etc., etc. Let's not forget, he also selected Gavin. And Gavin is more important than the 21 million bitcoin cap. So if you want to throw Gavin under the bus, you might as well throw everything else there too.