I think Munch is cool too but I prefer Abe. He's the man!
It was the idea right from the start that Abe wouldn't be the hero in the other games. And I think that's cool. The idea is to get to know Oddworld from different views and by different characters. It would really be boring in the end if they would make all the five games about Abe and all the extra games about Abe as well. There are a lot of odd things to reveal and new characters and I think that that's cool. Just hope that the rest of them would be as good as AO and AE.
(It's good that all of the games aren't about Abe (well Abe is in MO too, but...) but one or two games more about him would have been cool..
Well.. what can you use next? There aren't much left when you first take muds's meat and then bones...
)