There are many types of mascara.
What effect are you looking for? Wafty? Thicker? Cat eye effect?
What are your lashes like? Are they fine and long? Short and thick? Short and fine? Long and thick? What colour are they?
Have you sensitive eyes? Some mascaras give off fumes which make eyes water.
Are your lids oily or sweaty- this can mean your mascara runs and goes everywhere.
For example, I have long, thick lashes, with very sensitive eyes, and all eye make up runs off my oily lids, so I use Clinique lengthening mascara.
I've tried Lancôme and it's a second place. Cheaper mascaras irritate my eyes, and ones like Chanel make my eye lashes shorten and fall out.
Can't use waterproof as my eyes water all day and the mascara turns into flakes and irritates my eyes.
I never use mascara on my lower lashes as I'd look like a doll (and it would run off)
Clinique lengthening mascara has no nasty whiffs, stays put without flaking, or dissolving, and keeps my lashes healthy. I use garner micellar water to take it off.
It's my go to, and I always have a tube in my kit. I watch and buy Clinique products at bonus time just for the extra mascara tube you get as a freebie.