In some industries, like design, media etc humour is good, as it is frequently what the customer is looking for.
People don't come to accountants for humour, 9/10 they're there because they've got a problem (or because they've got to be). Gravitas and sensibility and knowledge are what people seek from accountants.
Accountants with attitude is great if you're not earning the bread and butter from accounts, book-keeping, tax returns and audits. If a lot of your business is from the creative side, from exciting tax or corporate finance projects, business planning etc, then you may get away with it, but it would need to be reigned in.
Sorry, but i don't think the world is ready for humour in accountancy yet.
