it is good to show the network?
 

For a while I do this question myself, in all my sites, in the footer I put my network, virtually the links to all of my sites. All rel = nofollow

But this is good or bad for indexing? My sites live practically only of search engines.

I see that some put their networks, others do not

On the one hand it seems a good thing because it shows visitors all your sites
On the other side maybe the search engines "link too much" sites and if one is also seen evil others are paying the consequences.

What you think?