My wife and I have lived all over the US and have never experienced that 'home town' feel that we get from Frontier Foods in Oroville. We've been shopping there exclusively for almost 5 years now and we've never had a bad experience.
If you're on a special diet and/or they don't carry a specific food item, you can ask Pat, Stephanie, or Allen and they'll get it in for you.
If you have a meat question or need a pound of tenderloin, Jesus from the meat dept is your man; he's super cool and gets right on top it.
Need a particular type of fruit or veg? Ask David or Brandy. They're both very friendly and knowledgeable.
Have a recipe question or need to know which ethnic ingredient is the best? Just ask Heidi. She's a sweetheart and knows how to cook.
Just need an awesome attitude with a simple purchase? Well everyone here so far has been awesome to us, so shout out to everyone mentioned already, plus sweet Debbie, Michael, Junior, Abbi, and the rest of the folks whose names we can't remember!