I can tell you that we've been using the recent Announcement items pretty regularly, and we really like them - however, the backgrounds for some of them are just _too_ specific. We wanted to use Men's Bible Study and Men's Retreat, but couldn't.
Words should never be part of a background, because that completely limits the background, even if we're doing something similar, the church may be calling it something else - i.e. Men's Fellowship or like our current Women's fellowship and Bible study - "Chick Flicks". That said, our Chick Flicks slide (Women's Bible Study background) is just right and quite girly 
You should _always_ use the capabilities of Proclaim to create these kinds of things for two reasons - one to showcase the capabilities of the slide editor and two to not limit how churches can use them!
A perfect example of this is the "Christmas Services" slide - where we first noticed the problem. We were able to use the plain "Christmas Announcement" slide and make an almost identical "Christmas Eve Services" slide using only the slide editor.