High ISO for photography

For those of you that are following this blog and trying out manual you may be afraid to up the ISO on your photos? I routinely shoot high ISO for many shoots, especially in the evening. Now, when shooting weddings and families I try to keep the ISO no higher than 800. If I need go higher for these circumstances I use flash. But if at all possible I like natural light. If there's noise, I live with it. It adds warmth and a mild texture. Or I can process in photoshop and take out the noise. This will leave a softer image but again many times when the light is low you are looking for a dreamy image anyway. Better to capture the moment that will never pass our way again. Experiment.