* Syntax sucks: I think Objective-C is actually pretty beautiful. Maybe I'm crazy.
* NSInvocation should serve the same purpose in most cases.
* I find the block syntax atrocious if compared to Lisp lambdas. It's not that bad. Blocks are objects, so you're creating an object, with all the same predictable retain/release semantics. Maybe a few gotchas if you're not reading the documentation and realize you should avoid retain loops. Hardly different from Java, only it's easier to miss it in Java, because you never release, anywhere.
The lack of namespaces seems silly to me: NSThis, NSThat.
It isn't that Obj. C is a bad language, it's just it doesn't feel like a more modern language, and yet it gets used because of the possibility of $$$. I do understand that you can come to love a language after a period of using (and understanding) it. And I do think a systems-level language should be used for apps on mobile devices, but we don't have to continue to be mired in implementation details that were an artifact of a language from the seventies.
I need to play with it more to get a better feel for it.
* NSInvocation should serve the same purpose in most cases.
* I find the block syntax atrocious if compared to Lisp lambdas. It's not that bad. Blocks are objects, so you're creating an object, with all the same predictable retain/release semantics. Maybe a few gotchas if you're not reading the documentation and realize you should avoid retain loops. Hardly different from Java, only it's easier to miss it in Java, because you never release, anywhere.