Should a guitar pick be flexible or not?

Why not to use a flexible guitar pick

Flexible guitar picks create a delay between hitting the string and the moment the pick runs off of the string.

Especially while playing guitar solos, you don’t want any delay caused by a guitar pick that bends. For that reason lead guitar players will use rigid picks.

Another issue with flexible picks is that you have to grip to it more firmly. This causes more tension to your forearm muscles. Which over time may lead to hand fatigue.
More tension to your forearm also reduces the ability of playing faster single note runs.

Thinner picks create more higher frequency tones, while heavier picks with more mass create more mid- and bottom-end tones. Higher frequency tones are more adaptive to pick noise, so please be aware of the tone thinner picks create.

When you need a little bit of flexibility in a guitar pick

Although ChickenPicks guitar picks aren’t flexible themselves, you will be able to improve your playing style. You will be able to create some sort of pick flexibility in a short amount of time.
The level of flexibility could be managed by the amount of gripping force between your fingers. In fact, you control the flexibility of it.

Precise and accurate

Gripping the pick firmly, you will be able to pick your strings precise and accurately. But gripping any pick too tightly may cause “hand fatigue”, so be careful.

When gripping less tightly, you will be able to strum your guitar like you would do on an acoustic.