I would like your feedback:
Me now use DS3

I see some people using multiple program and wonder why. I dont mean userfriendlyness or thing like that but mainly key topics shaders, light and rendering(engine) results.

What are pro's and cons ? Is a mix and match wise.

The work I mainly try (or going to ahahah) are realistic scene with characters. So no elfs or scsi.

Thks in advance.

Vue totally blows Poser and Daz Studio out of the water for rendering and scene building :)
same with Carrara, IMHO.

Daz Studio Pro now has GI and a 64 bit version so it's acceptable for rendering, provided that you have the content already. Carrara doesn't have a 64-bit version at this time, so, although you could build scenes, with superior modeling capabilities to Vue, the scenes would need to be somewhat small, and you'd be faced with limited and somewhat unrealistic atmospheres. Vue can't be beat for outdoor rendering and there is nothing on earth quite as cool as generating and painting ecosystems. You can easily import models from other applications, including Poser, but you may need to tweak the materials. 

There are reasons to use multiple applications, but there is also the time factor. Right now, I have no use for Carrara and Daz Studio Pro and am focusing on Vue, Illustrator and Modo. It will likely remain like this for several months to come, until I complete my scene. 

I tend to think of each app I use as an individual modeling/rendering tool combined together to make one larger 3D software program to create whatever comes to mind.

Mmmh.... probably don't really understand the question ... one can't compare the 3D needs to another ... they're totally individual ...

For the images, you are rendering (looking through your gallery) i clearly can tell, that DS3 alone or Poser alone is the right program for you. To create your style of images, you definately don't need more than that.

But for the variety of the 3D images i do, this can't be done with DS3 or  Poser or Vue alone. Impossible !
Many times i need vast landscape areas with many varieties of plants, reality like atmospheres, clouds, haze, special watereffects  ... and much more ... and DS3 can't produce something like that - only use just basic, pre-prepared stuff.

Like ShawnDriscoll already said - there are things that can't be done with Vue and there are things that can't be done with DS3 / Poser. So a combination of different programs IS necessary, to get the wanted results - if they are wanted ... in your case and your 3D scene style - DS3 alone is good enough ...