Now, I think, it's my time to show-off!
Following posts contain photos of different citrus varieties, along with their brief descriptions, which I grow in containers in my backyard.

Igor

Citrus japonica 'Nagami' or Fortunella margarita, grafted onto Citrus aurantium rootstock.

Citrus sinensis 'Sanguinello', grafted onto Citrus volkameriana rootstock.

Citrus sinensis 'Navel', grafted onto Poncirus trifoliata rootstock.

Citrus aurantifolia 'Key lime', grafted onto Citrus aurantium rootstock.

Citrus sinensis 'Valencia', grafted onto Citrus aurantium rootstock.

Citrus reticulata 'Clementine', grafted onto Citrus aurantium rootstock.

Citrus limon 'Lunario', grafted onto Citrus aurantium rootstock.

Excellent collection Igor.

Superb. How are you overwintering them ?
Those Nagami fruits looks extremely large. Well, if compared with fruits of my oval kumquat (Nagami?).

@Laaz - Thanks!

@ivica - Some of these trees are new to me, actually recently bought. So I'll still have to cope with overwintering those.
However, other ones are left intact in an unheated bright room all winter long. With no artificial light and very very little watering.
Since majority of them are growing on sour orange rootstock which is proven to be drought tolerant.
As for the kumquat tree, I'm pretty sure that those really are nagami, oval ones...
The tree was labeled by the Italian nursery, and they actually do taste like nagami. Sweet rind with a tart pulp, which makes it easier to distinguish from other kumquat varieties. And yes, I was surprised too, they are bigger than those we usually get from our local grocery stores.

BEAUTIFUL, those kumquats are huge compared to those my mother bought in a store last week.

That is a very nice collection!

I see you have used trifoliata rootstock but why not on all of them? They are winterhard and pretty water resistant so I was wondering why you opted not to use trifoliate rootstock on all of the plants?

Very nice collection! I especially like that Valencia tree!

@adriano - Thank you! They are quite big indeed.

@Sven - Thanks! In this part of Europe, sour orange is almost traditionally used as a rootstock for establishing almost any citrus variety, due to absence of citrus tristeza virus... Sour orange is quite cold hardy too and has an outstanding crop quality.

@Marc - Thanks! Valencia is one of my favorites too, I love its fragrance spread all over my backyard!