I have only one pair of secateurs - Felco's No 2 - Used for about 10years now. last year every day though (branches for the goats), and now they are in need of sharpening.
Have also got a second pair (of cheaper ones) in the car for opportunistic branches (mainly brambles) on the school run... they are already showing a bit of wear... but will do.
If you use them regularly - Felco's is the answer.