What does your 'home' instance really matter? - Lemmy.world

One thing I’m not clear about is the impact my home instance has on me. I joined lemmy.world and am currently using the connect for lemmy app. I know when I sort by Local it will only show me posts from lemmy.world, but beyond that are there any things to keep in mind? I have read that lemmy.world has been hit by DDoS attacks but I’ve never had any problem using connect for Lemmy during those times as far as I know.