What are your 10 Favourite C & S species/cultivars ?

I think we all have favourite plants...maybe we love the look of them, or maybe they just grow well for us. It might be a plant you know you'll always want in your collection. Or maybe they're the Holy Grail - plants you just can't get or just can't grow.

I know I have a number of favorites, so I thought it'd be a nice discussion subject for the members while our charges are sleeping - I'll give it a think and post my list soon. What are yours and why ? Doesn't have to be 10, even if it's only a few, share your love !

Great idea for a thread Navajoa.

List of fav's from most to least.

Lophophora
Pelecyphora
Ariocarpus
Copiapoa
Aztekium
Trichocereus
Mammillaria
Coryphantha
Uebelmannia
Ferocactus

The absolute, ultimate holy grail of a plant, the one I would give my left nut to own, would be a mature Crested Lophophora williamsii.

There was a 3cm, crested L. fricci for sale on e-bay a day or two ago. It sold for over $600.

So hard to choose!

My favourites are I suppose a bit different to most peoples' as far as I can tell. Here are some that I could come up with but they probably only reflect what I'm thinking at this moment (in no particular order):

Carnegiea gigantea
Selenicereus megalanthus
Aloidendron barberae
Stenocereus eruca
large Pachypodium spp.
Euphorbia tirucalli (the plain green one)
the whole Didiereaceae

And some that I don't think I'll ever get but are still favourites:

Jasminocereus thouarsii
Strophocactus wittii
Welwitschia mirabilis

Now, that was interesting!

What a great post!
Ok, so just a few favourites...

neochilenia - pretty much all of them.
Mammillaria - bosacana in particular
Astrophytum - spineless varietes
Trichocereus pachanoi
Ferocactus
Lophophora

There are more but those are the ones that come to mind.

O goody. Let's go...

Matucana madisoniorum - it was a first flower in my collection. That one still sits in my avatar.   

Echinocereus (that bright red flowered ones) - why? Very red!!!!

Echinocereus (magenta with green stigmas) - Ooooo!

Glandulicactus (especially wrightii) - I can't exactly tell why, it's just the way it is.   

Lobivia - becouse of their shiny flowers

Agave lophantha 'Quadricilor' - just look at it and you'll know

Adenium - flowers, flowers, flowers, and they seem easy to produce from seed   

I'm sure I have more of them to put here, but don't have on my mind right now.