Quirks

Everybody has their quirks. Some people turn off the lights twice before they go to bed, other people have to place their pens in order of length. I have my own little quirks too.
For example, It's imposible for me to throw away any type of box, I always think that I will need them later. There are boxes everywhere in my closets*. Also I save everything in it's own box. Those are very useful quirks because my son loves boxes to play with and he always finds something exciting to do with them. Also we have boxes when we have to carry something to somewhere.
I have an obsession with the turtles too. I immediately love all the objects which have that form and I want to buy them, but I resist the temptation. Otherwise my house would be full of turtles of different sizes.
And if that was (were) not enough, I love the things egg-shaped things/objects, so I have to resist to buying them too.
I have only one wooden egg and two made of marble, all three ones are very small, I have three or four little turtles and a lot of boxes. I think that I'm not doing so bad. Don't you think so?

* We don't use the word 'closet' much in British English, we'd generally say cupboard or wardrobe, depending on what type of 'closet' it is.

Was/were - 'were' is probably the correct grammar (subjunctive I think) but most native speakers would probably say 'was'.

Quirks

Everybody has their quirks. Some people turn off the lights twice before they go to bed, other people have to place their pens in order by lenght length. I have my own little quirks too.
For example, It's imposible to me to throw away any type of box. I always think that I will need them later. There are boxes everywhere in my closets. Also, I save everything in their own box. Those are very useful quirks because my son loves boxes to play with and he always finds something exciting to do with them. We also have boxes when we have need to carry something to somewhere.
I have an obsession with the turtles too. I inmediately immediately love all the objects which have that form look like turtles and I want to buy them, but I resist the temptation. Otherwise my house would be full of turtles of different sizes.
And if that was were not enough, I love the things egg-shaped, so I have to resist to buy buying them too.
I have only one wooden egg and two made of marble. Those three ones are very small. I have three or four little turtles and a lot of boxes. I think that I'm not doing so bad. doing it badly. Don't you think so?

Very good English! Muy bien!