My least favorite Columbo is probably Forgotten Lady. I can still watch it, but it doesn't hold my interest quite as much as most of the other episodes. At least the ending has a slight twist compared to most other episodes.
For the nineties era Columbo's, personally I would have to chose No Time To Die as my least favorite.

Firstly i agree with YM and Cassa about the sex, violence and swearing, much prefer the films/comedies where these are non-existant, seems the asy way out to have somewhere swear instead of something original.

As for the new columbo's v old, couldnt care less about picture quality or whether a big star is in the episode or not, comes down to whether or not i sit in front of the tv and feel disappointed after watching them and this happens more often with the newer ones. As said previously by others, the newer ones tend to drag in the middle (for some reason Columbo likes the nightlife does pretty much nothing the whole way thru until suddenly its the end and you sit there thinking was that cut). Also the acting (by whoever) isnt as good and the same goes for the script, i sat thru Columbo goes to college and was asking often "who says that?".

Old bands can reform with exactly the same line-up and the magic just isnt there and no matter how many times you try to convince yourself it just doesnt feel the same. This is true for 90's columbo in my own humble opinion.

God bless,

Matthew