I have 7 jeans:
2 mid rise, straight-flare (not so tight on thighs, flare below knees), with a clean finish, dark grey and dark blue
1 mid-rise, skinny-flare, clean finish (skinny on thighs/flare below knees),
dark blue
1 mid rise, straight jeans, clean finish, in thicker fabrics,
grayish-blue
1 mid rise, skinny flare, a little more 70's, in thinner fabrics, washed out medium blue
1 low rise, straight-flare, more casual but more beautiful, washed out dark blue
1 low rise, straight flare, very casual and very old
Note 1: I usually use jeans+shirt+cardigan/blazer/coat for work, with a few exceptions once in a while. Where I say "clean finish" that's "less casual jeans I can use at work" - no rips, details, embelishments or different washes allowed
Note 2: no skinny jeans fits me, so I have a skinny in a thicker/more resistant cotton fabric that has a "jeans style" finish