I've enjoyed a number of wines that are simply great when talking with family and friends, even if it gets into politics. Since tastes vary from person to person, I look for wines that aren't too dry or too sweet, something that everyone can enjoy.
The possibilities are endless, here's just a few...I've chosen a few of my favorites, feel free to augment.
1. Mosel (German) wines: a Kabinett will be less sweet than a Spatlese, and they're easy to find at most large retailers. Depending upon the group, I might be tempted to break out an Auslese, which is considered a dessert wine. My strategy here is if no one joins me, I get the whole bottle to myself. Let me tell you, that's NOT going to happen, though I can dream about it. The beauty of these wines is their low alcohol content, usually 8-9%. That's why I didn't feel any "buzz" at winefests until I was well into my third bottle.
Varietal: Riesling
Llano Estacado (Lubbock) has an excellent Riesling.

2. Rosa Blanca:

Varietals: 90% Muscat & 10 % Merlot
A beautiful bright berry color starts off this wine. Wild raspberry flowers on the nose and a taste that is reminiscent of sweet summertime memories of lemonade and popsicle stands.
One of my wife's favorites.
3. Sauvignon Blanc

Varietal: 100% Sauvignon Blanc
A bright crisp wine that is perfect for the summer months! Subtle aromas of pear begin this wine. Flavors of pear and pumelo with a delicate minerality on the finish.
This is a wine my daughter and I share when we make a trip to Lost Oak. She prefers dry, I prefer semi-sweet to sweet. Add in a cheese board, and everything's right with the world.