As promised peeps, here are my pastor's thoughts on the subject, which I think offer a useful contribution to the debate. Whether or not it would impress an atheist tho is another matter. Perhaps any atheist passing by could grace us with their counterblast.
Hi Costas, Stimulating as ever. A couple of lines of thought I’d go down.
1) God is Triune and each Person seeks the glory of the other. Yes, the Trinity acts for his own glory; but what that actually means is self giving as the Father glorifies the Son, the Son glorifies the Father and the Holy Spirit glorifies the Son and Father. God’s pursuit of his own glory is therefore the very opposite of egotistical.
2) If we both have the glory and it is necessary for us to be glorified, it is right that we seek our own glory. For example - a doctor on a flight. When they call for a doctor, the doctor might think, “I don’t want to boast about my credentials, I’ll keep quiet”. In that case, the doctor both has the glory (he actually is a doctor); and it is necessary for the good of others that he be recognised as such. The ego problem only arises if either the person is only pretending to be a doctor (in which case he doesn’t have the glory); or there is no need for him to let it be known (in which case, he is just randomly boasting of his skills). In the case of the creator God it is right that he seeks his glory because he has the glory, and we need to know that glorious light, life, truth and love. Given his glorious reality and our need to know it, it would be negligent of him not to make it known and cruel of him not to require our worship.
That’s how I usually handle the question.
Now I must say, I would never have thunk to go down that route. My response to the same question will follow in due course. I just can't say when exactly. It might hafta wait till I'm on holiday.