Hi, I can give you the info I have.. remembering that everyone's ideas and tastes are different
I found the southwest, south, and southeast to be the most inviting areas. If I were moving there with no kids, I'd personally want to be around the 41st to 59th street areas, since that's where everything is happening.
Sertoma Park is very nice, but most of the parks are just fine. I have never felt unsafe anwhere except in the downtown area (just a little) and central area (a little more than just a little).
Apartments:
sioux falls / SE SD apts/housing for rent classifieds - craigslist (I know Craig's List gets a bad rap sometimes, but most all of these seem to be legit).. I would only call ones with a number and not just an email.
Craig's List also has sublets, and I've seen some pretty desperate people offering some pretty good deals to get someone to take over their lease because they have to move out of town.. some even offered no deposit and first month's rent paid in some pretty decent places.
Also try:
Sioux Falls Apartments, Houses, and Homes Rental
Here's a map of the bike trails:
City of Sioux Falls - Bike Riding and Trails
Sertoma has them too.. That's located here:
Google Maps
Traffic is hairy throughout the day, seems the days of 9 to 5 are far gone. Worst is 4 to 6 pm, but it isn't anything tragically horrible like in big cities.. just have to have patience
Streets like 41st and Minnesota are some of the busiest.
It's not a real humid area. I really can't remember the last horribly humid summer, and it usually changes through the season..
I really like Sioux Falls. It is growing and with growth comes some undesirable people and situations, but all in all it's a really nice place with alot of opportunity if you just keep looking for it
Also, here's a few other fun things to check out:
Things to Do in Sioux Falls - Sioux Falls Attractions - TripAdvisor
The Local Best (Sioux Falls Area (SD)) (great deals and find out what the people voted for as their favorites)
Some more info if you've never seen this site:
Visit Sioux Falls, SD | Conventions, Tourism, & Vacations
Hope you love it