The last Anime I watched, and the current one I am watching had/have a timeskip(s).
I particularly dislike this. It really makes you lose a sense of the character, because people change as they grow up. It also makes you lose that sense of attachment because the characters are usually drawn to be older.

It's sort of like a cheap fucking easy mode way of saying fudge those old ideas wee're going to 180 this whole story...

maybe I'm overreacting... either way I dislike it :/

Timeskips are defined as what? Do flashbacks count?

i think timeskips are useful when you want your character to aged a years forward without missing the years that he was done, or it will be getting some OVA episodes in between those years to have more episodes in that anime, lol