I've never paid a much attention to tubes, and haven't noticed quality or performance differences, which is not to say they don't exist, of course.
I do try to stick to name brand in hopes of better quality, so that may be a factor, and since last year, I've kept stock of Panaracer R'Air tubes, primarily because they're extremely compact in the saddlebag, but also because they are light. They may confer performance benefits when fitted, but I can't tell. I've only had one flat with them, and the leakdown was very slow.
If I didn't worry about space or weight, I'd not give any thought to tubes, honestly.