I’ve noticed, in Sublime Text 3, that the CSS Comments triggered with Ctrl+/ the comments come out like Comment Here*/ instead of `/* Comment Here */ like the usual comment structure.
It’s a pretty easy fix that involves modify Comments.tmPreferences in the CSS Module.
I implemented this fix in the CSS 3 Package, which has the same structure, so example viewable here: https://github.com/y0ssar1an/CSS3/pull/54
Would love to see this implemented in ST3 
Edit, I just noticed that the appropriate place for this is probably: https://github.com/SublimeTextIssues/
Sorry for not posting there initially - but maybe this fix will be useful to other users in the meantime