The Burden of Knowledge

Your best software developers are not the ones you turn to for everything. Your best are constantly distributing knowledge, removing themselves from being a key-man dependency. Your best have delegated sufficiently that they have freed themselves up to learn new skills. 

It is a natural instinct for software developers to want to learn more, to consume all of the knowledge in their vicinity. Like a sponge growing heavier the more it soaks up, it feels good to become the owner of more knowledge. This applies to good software developers anyway; you can spot the bad developers a mile off as the ones who have closed their minds off and don't want to learn anything new. I know what I'd do with a sponge which refuses to soak up anything new.

"Find the most talented person in the room, and if it's not you, go stand next to him" Harold Ramis

Your Job Title Means Nothing To Me

Every time someone introduces themselves as a senior developer, senior designer, senior whatever, I cringe.

They are trying to impress people on how talented they are, how respected they are.

Badge of Honour

For some people, they wear their senior title as a badge of honour. They may have worked their way up through the ranks after having joined as a junior. Invariably in these environments they would have worked alongside a senior. Well, not really alongside; the junior would work under the senior. After all, that's what those titles are designed to achieve: a clear definition of the hierarchy.