I'd always meant to ask, but never got around to it, why do some characters have the red cheeks and others don't, how was it decided which would/wouldn't?

You probably won’t like the answer ^_^

It’s all up to our artist Elisa who draws them as she feels inspired. Basically if she wants to give them a childish look (because the script require it or just because she likes it), she adds the red cheecks… This means that the same character can have them in a strip but not in the next one (well, except for Smithy, he always has them ^_^)

Too Much Young - Part 1 Release Date: Mar 14, 2011 Source Link: http://comicwho.com/?p=360 Typo note: Panel 3, “then” should be “than”

Too Much Young - Part 1

Release Date: Mar 14, 2011
Source Link: http://comicwho.com/?p=360

Typo note: Panel 3, “then” should be “than”

The New Screwdriver Release Date: Mar 7, 2011 Source Link: http://comicwho.com/?p=351 Typo note: In panel 3, “bougth” should be “bought”

The New Screwdriver

Release Date: Mar 7, 2011
Source Link: http://comicwho.com/?p=351

Typo note: In panel 3, “bougth” should be “bought”

The Sound of Drums Release Date: Feb 28, 2011 Source Link: http://comicwho.com/?p=347

The Sound of Drums

Release Date: Feb 28, 2011
Source Link: http://comicwho.com/?p=347

Doctor Who Experience Release Date: Feb 22, 2011 Source Link: http://comicwho.com/?p=214 This strip was made in occasion of the Doctor Who Experience in London. You can read our review here: http://comicwho.com/?p=273 Beware, it’s full of spoilers (and typos, in case you’re a grammar nazi :D)

Doctor Who Experience

Release Date: Feb 22, 2011
Source Link: http://comicwho.com/?p=214

This strip was made in occasion of the Doctor Who Experience in London. You can read our review here: http://comicwho.com/?p=273 Beware, it’s full of spoilers (and typos, in case you’re a grammar nazi :D)

Valentine’s Day Release Date: Feb 14, 2011 Source Link: http://comicwho.com/?p=209

Valentine’s Day

Release Date: Feb 14, 2011
Source Link: http://comicwho.com/?p=209

Regeneration - Part 2 Release Date: Feb 7, 2011 Source Link: http://comicwho.com/?p=206

Regeneration - Part 2

Release Date: Feb 7, 2011
Source Link: http://comicwho.com/?p=206

Regeneration - Part 1 Release Date: Jan 31, 2011 Source Link: http://comicwho.com/?p=203

Regeneration - Part 1

Release Date: Jan 31, 2011
Source Link: http://comicwho.com/?p=203

Red Light/Green Light - Part 2 Release Date: Jan 24, 2011 Source Link: http://comicwho.com/?p=200

Red Light/Green Light - Part 2

Release Date: Jan 24, 2011
Source Link: http://comicwho.com/?p=200

Red Light/Green Light - Part 1 Release Date: Jan 17, 2011 Source Link: http://comicwho.com/?p=197

Red Light/Green Light - Part 1

Release Date: Jan 17, 2011
Source Link: http://comicwho.com/?p=197