Well, I lived in Yuma, graduated from high school there (Kofa), left in 1966 and probably went back maybe five times (the most recent being thirty years ago). My parents moved away soon after I graduated. If you can deal with the summers in Yuma, then you are a true Yuman and I am glad that you found your place in the sun. You are a nice guy and if that is to your liking, then I wish you all the best. Make sure you go over to the California side and visit the sand dunes. You probably have already been to the old Territorial Prison historical site. (They used to have a Gatling Gun on display there). Yuma used to have one of the biggest and best gun shows in the Southwest in the Jan-Feb timeframe, I hope that they still do, and of course there is the rodeo and rodeo parade (down 4th Ave) in the same time-frame. I'm pretty sure they still have that.
One of the best Mexican restaurants that I ever ate in was at Cretin's which used to be down in the valley, but I guess they have moved. Start your meal with a huge tostada de harina and a pitcher of 'ritas. Their chile verde used to be some of the best around.
I may return to Yuma one day, perhaps for my 50th HS Reunion (assuming they have one). I was glad to leave, Yuma is either one of those places you hate or love, and I never liked and still do not like hot weather regardless of the humidity level. I'm glad it is to your liking.
The only other thing I can say is watch out for the snowbirds. These geezers come down mainly from the upper mid-west in the winter and swell the population up. They are an impediment to traffic safety and on a good day might even drive 15 mph in a 25 mph zone.
Congrats, have fun and enjoy the gun culture and some of the nuttiness that is associated with Arizona in general