Everyone is different, but Tren does seem to give the worst sides for almost everyone i know. Within a few weeks you will notice an increase in BP, your anxiety will go up, some insomnia, and it can put you on edge. Many people get irritated easily on Tren, i'm a very calm guy, but on Tren i find myself saying things i usually wouldn't to people. It makes me a bit irritable and sometimes makes people aggressive.
Like any AAS, it usually increases your natural traits. If you're an aggressive guy, it might make it worse. If you're a calm guy, it's probably not going to be an issue. It can cause problems with sleep and makes you sweat at night. I usually don't get night sweats from Tren, but it makes me break out all over the place. Tren and Deca seem to give me bad acne.
It's all different for each individual. Some people say Tren E gives more sides than Tren A, but i actually find that i get less sides with Tren E.
So, just start off slowly and don't increase the dose until you are ready. Most people don't have issues with Tren, but many people simply do not run it because it makes them a bit loony.
Good luck!