With clothes, it is almost more fashionable, atleast to me, to purchase more off-brands and style and tweek them to suit me because so many people are wearing the same on-brands and playing them out faster.
I basically look for the right colors that suit me and a good fit is always important. If I can get the right color and fit from an off brand at 50% less than the on-brand, I'll definitely buy it. Besides, I like to wear my clothes, I don't like them to wear me. Because of this, I would never wear a logo across my chest. The jean companies pay people millions each year to advertise for them, but I'm not on the payroll so I think HUGE logos visible are just lame. Mostly when I go out, people say "That shirt looks good on you." not "nice shirt.", which makes me believe I've done a good job at finding clothes to complement me not just nice clothes.
Although, I think my taste differ a great deal from your own,lol.
When it comes to food, again: if it taste good and doesn't make me sick, I'll buy it. All these Healthy alternatives: I basically eat the same things I've always eaten and have been living just fine for all these years and won't pay more for all this new and improved stuff.
Cleaning products: this is were it pays to pay more. off-brand cleaning products just don't work as well and you have to use more of it to get the desired effect. On-brands when it comes to these are the better and more economical choice. You really do get your moneys worth when you pay more with these.