| ON TOPIC | 1a) Comment expanding on the theme of the post | 
| 1b) Comment developing the theme of the post | 
| 1c) Comment agreeing with the theme of the post | 
| 1d) Comment disagreeing with the theme of the post | 
| 1e) Comment giving an example on the theme of the post | 
| 1f) Comment recounting a personal experience directly relevant to the theme of the post | 
| 1g) Comment filling a gap left by the post | 
| 1h) Comment following on from other comments on the post | 
| VEERING | 2a) Comment veering fractionally off-topic | 
| 2b) Comment veering more blatantly off-topic | 
| 2c) Comment telling some personal anecdote only vaguely related to the post | 
| 2d) Comment picking up on a tangential part of the post and going on about that | 
| 2e) Comment picking up on one tiny part of the post and relating a personal experience at great length | 
| 2f) Comment ranting generally around the theme of the post | 
| 2g) Comment accidentally posted twice | 
| 2h) Comment apologising for accidentally posting twice | 
| PEDANTIC | 3a) Comment pointing out a factual error in the post | 
| 3b) Comment quibbling with the central theme of the post | 
| 3c) Comment pointing out a slight exception to something in the post | 
| 3d) Comment picking holes in one tiny unimportant part of the post | 
| 3e) Comment picking holes in another person's comment | 
| 3f) Comment pointing out an 'error' which is actually correct | 
| OFF-TOPIC | 4a) Comment accidentally posted to the wrong post | 
| 4b) Comment apologising for being off-topic but... | 
| 4c) Comment recognising it's off-topic but... | 
| 4d) Comment failing to notice it's off-topic | 
| 4e) Comment responding to other off-topic comments | 
| 4f) Comment reigniting some off-topic thread which might otherwise have died | 
| 4g) Comment careering off down some conversational cul-de-sac with no relevance to the original post whatsoever | 
| UNNECESSARY | 5a) Comment about an old post, but added to the latest post in case nobody notices | 
| 5b) Comment pointing out a news article they think nobody else has seen | 
| 5c) Comment pointing out a news article everybody’s already seen | 
| 5d) Personal message that would have been better sent as an email | 
| UNWELCOME | 6a) Comment from someone wishing I’d written about something else | 
| 6b) Comment from someone wishing I’d written about anything else | 
| 6c) Comment postulating what today's post should have been about instead | 
| 6d) Comment from someone who wants their time back | 
| 6e) Snarky comment taking a dig at the blogger rather than the post | 
| OFFENSIVE | 7a) Troll | 
| 7b) Spam | 
| 7c) Personal insult | 
| 7d) Not getting any comments |