It will depend a lot on your schools as they will differ wildly with principal, VP and co-teachers.  I now teach in a high school but spent a good number of years in the middle and elementary levels.  Like you said the conversation factor will be a big thing as now I love to be able to have jokes and conversations with my students.  Something that really wasn't possible in elementary.

If you are given a free reign in elementary that will be great.  It will also depend on whether you have to teach the text book as well.  So make sure you have short tasks (5 mins max.) as kids have shorter attention spans than middle/high.  A lot of it (depending on your co-teacher's passion) will involve classroom management and kids sitting in their seats.  Speaking board games and cards are good to get students practicing vocab and reading.  Try and aim for the middle level students.

In experience terms, it will be good for you to have taught all levels like this.  It will be challenging at times in elementary school but being able to work through that will give you another string to your bow.

I teach Elementary and Middle. Despite only teaching Elementary 1 day of the week, I love it. They will not be able to understand you like Middle or High School students but you will probably get more free reign with your lessons. I teach in a rural area so my CTs at my ES don't want me to teach the textbook. I can, however, play games/provide worksheets that go over the key words in the lesson. This gives me more freedom to do more craft-like and creative activities that are more hands-on. Or do a lesson that's completely separate from the book.

Ask your CTs if this is okay, they realize that the students won't understand most of what you're saying. So, if allowed, this could be a huge advantage.

If you're teaching upper elementary (5th & 6th) some of your students levels will surprise you. Some of my 5th & 6th graders are higher level than my middle schoolers.

Complete opposite of my experience.  Been doing elementary this year.  I must use the book and have much less freedom than what I had in Middle School.  I plan an extra 5 to 10 minute activity that I sometimes get to do.  But not always.  I had much more freedom in Middle School and rarely opened the book there.  I did make my lessons and power points based on the book using expressions, but could do what I wanted mostly.  Although the teachers are nice and many are younger than middle and high in the cities anyhow, it does seem a more strict managed environment whereas middle and high are less strict with the kids and with some other things, though studying is much more important at those levels. 

But, the younger kids feel instant love towards you saying hello to you and high fiving you; though I guess the middle school kids sort of did too in a lesser way.  The younger kids are better behaved (except for grade 6) but there's a lot more emphasis on repetition and practice.  Can be kind of monotonous.  Each has their pros and cons I guess. 

I should say I worked a lot harder in middle school with longer classes and planning much more material for my classes.  But I also enjoyed the higher level of communication and such.  Neither is terrible once you get use to it after 6 months or so. 

Yeah, at my schools now I have freedom to do what I want. I figured that with elementary, I'll probably be by the book. Guess we will find out in a month!

Get over it Dhazaras!