Who prefers all the same size digits?
Who prefers smaller seconds?
Who doesn't care as long as it has numbers glowing orange?
Yes, to all of the above !
I like all of those presentations, but the main goal is the overall presentation, including what type of case it goes into. I've even mixed end view (IN-4) with side view (ZM1032) tubes in my 1st nixie clock. Its a 4 digit (hh:mm) animal.
Here I go on my common rant again: I still want to see more case varieties that just 6 tubes sticking straight out of a rectangular box. And if you think you're skills aren't up to snuff, to build something spiffy, you can always used a 'found item' (or found object), and work the tubes into that. Around the time I joined this group (2003) there use to be some friendly competition on making clock cases. I haven't seen too much of that lately. Way too many rectangular boxes with tubes sticking out of the top. </rant>