You don't have to resort to bland words instead of words like chatterbox and bubbly - which are in fact, bland cliches in themselves.
How about: witty, funny, friendly, caring, outspoken, brave, clever, loved, admired, envied, warm, affectionate and a million other compliments up to and including 'bloody good officer'.
How about taking a short time to talk to a few people so you can use some personal anecdotes of things they did? And if you're going to say there wasn't time, let me assure you that there always is.
It's a chief constable's job to phrase a speech so that we know just how valuable his officers were not just to him and to the community.
Chatterbox and bubbly are fine if they come from friends and relations struggling to describe a loved colleague in their grief and not used to being quoted. But I expect more from a chief constable and I think the rest of you should too.