For me there’s a few different reasons for different types on protein bars. There are a few good ones out there like Quest Nutrition (if you can get over the science project in a bag ingredients and sugar alcohols).
for a cleaner, low carb on the go holy crap I’m hungry but have no food with me, I prefer Quest Bars.
for the I need carbs and protein fast after workout bar, especially during a bulk I like the good ol MetRX big cookie crunch bars.
now there’s all kinds of bars and cookies and snacks this day and age. I seriously found an oatmeal cream pie protein cookie with the brand name “Fina Plex”. I took a pic and sent to by buddy and said “look walmart has tren cookies!”
let’s face it, 99% of them are crap and over priced. I used to make protein muffins with almond flour, whey and a few other things that measured out to be around 20g protein and 250ish clean cals per muffin. Throw in a baggie and they were quite filling and kept you feeling a little less hungry for longer due to the almond flour.
now days I make my own jerky with elk or grass fed black angus from my aunts farm. Easy grab and go protein.