I like them sliced thin, along with thinly sliced onion (red onion in the picture, but color doesn't really matter to me), and put in a container with a lid that has a good seal. Then I sprinkle them with a pinch of salt, pepper and maybe sugar, and then pour in roughly equal parts of vegetable oil, cider vinegar and water. Seal, shake, and let sit for a little while. I like them best when chilled. For two small or one medium cucumber I use a small to medium onion, and roughly a quarter cup of each of the liquid ingredients. This is to taste, so if you like it more puckery, go heavier on the vinegar.
I find if I use too much oil (compared to the vinegar and water), it can seem a little too oily, especially when cold!
Oh, and I've been known to include some snips of dill if I have it, but I don't usually have it around.
And another great way to eat cucumbers? Slices of pumpernickle, spread with cream cheese, topped with thin slices of cuke, and sprinkled with a little dill (dry or fresh). Soooo good! I've even done this on pumpernickle cut with a bat-shaped cookie cutter for Halloween parties. The near-black bread is great!