An extremely silly question

My apologies for this question, in case it's one of those on the line of "do cacti flower?", but it's something that I've given some consideration to, never reaching a definite conclusion.

Do you turn your plants in relation to the sun? I keep the labels on my pots on their North side and try to keep the orientation of the plants whenever I repot them, but is this needed or even wise? Plants on their habitat do not get turned, but they often develop a tendency to lean in some direction, which is perhaps undesireable and certainly untidy in some species. What is your opinion?

I have to say that I do not turn my plants deliberately, but they do get moved around the glasshouse on a regular bases thoughout the summer has part of my pest control system.

Over the years I have noticed a few items in relation to flowering....
a) plants that have been produced from seed by myself and grown all their life in my glasshouse have no problem flowering regardless of where they are sitting on the staging and they often begin to flower at any earlier age.
b) plants that come from an outside source can take longer to adjust / adapt to their new surroundings and the older the plant the longer it will take.
c) if plants that produce buds early in the year are moved at that time, they tend to abort those buds.

My greenhouse gets much more sun on one side than the other. Some plants appear to be more light sensitive than others, so I do turn mine, but not on any form of regular basis, only when I see that the plant is inclined towards the sunnier side.
In habitat, as you say, they are fixed in position, so you do see plants that have grown towards the sunnier direction, but then the sun generally is very much stronger than we get here in England at least, so it can be less marked.
I don't think it inhibits the flowering as far as I can tell. In habitat, many Mammillarias grow in part shade, under trees, or other spiny bushes, or in grass, and so don't need all day sun.
Tam is right, it takes a while for plants bought elsewhere to become acclimatised to your own specific conditions, just as they will take a while to become used to your watering regime and your own preferred potting medium.

Like Chris, my greenhouse receives more sun on one side than the other.

I've noticed that some of my columnar type plants, M spinosissima; M. microhelia etc., have a tendency to 'lean' towards the light. And the spination on some plants seems to be better developed on the 'sunny side'.

So I do rotate/relocate my plants from time-to-time.

I've also noticed that older/more mature acquisitions take longer to 'settle-in'. Sometimes they never do. A little like people really, I guess they get set in their ways!

Si