There's no such thing as a bad ice cream in my book! And it's fun to make-- I've had some success with homemade ice creams, either a vanilla, or just a sweet cream frozen custard. But it is a lot of work... so I do usually just buy ice cream.
I do like ice creams with chunks in them. Ben and Jerry's is a brand I really like, but anyone who stirs in cookie dough (or cookie bits)... candies mixed in... chunks of pound cake! Frozen pound cake is really up my alley for some reason, so a birthday cake ice cream with chunks is another kind I like. As much as I like interesting textural stuff and all, a simple sorbetto or vanilla is still nice. Talenti's sorbettos and gelatos are also faves, but I only pick them up if Target is having a sale, because I'm not made of ice cream money.