To a certain extent I think comparing best/worst locos is irrelevant as it's subjective to a large degree.
For example 35 was your favorite but it must have been someone else's worst.
Perhaps if we were to rate them by engine hours or miles then it may be possible to comply a more objective list.
I just don't seem to remember 14 as a reliable one. It had a fantastic name though!
To be honest, 21 I just didn't like the name. Somehow, to me, "Rodney" just doesn't sound as awe inspiring as Dreadnought, Fearless, Illustrious, Invincible, ect.
I'm surprised you thought 07 was a heap of junk, as it was one of the last (at 46's expense, if memory serves me right )
31 would have been in my "fair" list were it not repainted in it's last year or so of service. It always seemed to be spanking clean after that.
In regards to 49, that should have been in my "fair" list. 149 was what I should have put in my best list.
There's a chap on this forum who reckons 35 was the best of them all!