I was chatting in the ecology group today and someone wrote "Mi ege devas sportumi pli." In English I'd respond with "Don't we all.", as a way of saying "jes, mi bone komprenas vin. Kiel ni cxiuj.".
I wasn't really satisfied with any of my translations of it, as they all seemed to need so many words. It wasn't really "punchy".
I guess this is very similar to How can I say "I feel ya"? , and it is also slang or informal language, but I am looking for something that gives the feeling that we all share this feeling, not just me.