I think I would prefer the rear kitchen so you don't have the stove hood venting under the awning. Ditto for the water heater and fridge panel. They kick out noise and heat.
And I agree with the problem of the curb-side slide taking up space under the awning, or in most cases, they just use an excessively short awning which makes the whole rig look odd.
This is one of the main reasons I purchased my current TT. The kitchen is on the starboard side and the dinette is to port, so you can enjoy the view of the lake (or whatever) rather than the camp road and hookups behind the trailer. Also, we are able to have a 19' awning on a 23' box, so the area under awning is great for it's size.
But if you like to be inside, the dual opposing slides with an island sink in the kitchen is hard to beat. And about the only thing that would get me into a 5th wheel is a Front Living setup. Those are great.
2013 Winnebago 2301BH-Red
2012 Ram 2500 Megacab HO CTD