i generally only use paypal these days. Not because im a big fan, but it seems to be the most accepted by the general internet user
Depends on if you have a merchant account already established at your bank or not, and also what services and gateway they offer to you. Some are cheap, some are very costly. Both have good points and bad points. The worst point I know about PayPal is they side (immediately) with the customer and not you, so charge-backs are expensive and frequent if someone complains for a refund even if they violated your TOS and you are justified by canceling their product.
Normally i used the fund transfer from paypal, but now a days its strict in internal money transfers between same country. As for my concern, paypal is best.
Both of them are good. 2checkout might be better for you since your country is not supported by paypal
Not any of them, I prefer using Liberty Reserve with less fee, thou it may not secure for many people as it doesn't have dispute system. Once you sent payment, it gone forever.
I've never used check out so I couldn't really tell you which is better, but I do use paypal and they're good so far.
Obviously paypal is my 1st choice and it is the easiest way to send or receive payments around the world. Even for shopping purpose it is easy, secure to use our credit/debit cards.
i too prefer the paypal for online transactions and it is very easy to transfer or receiving the funds and its very safer