Indeed, steroids will usually change your behavior, in one way, or another. Some get aggressive on roids, others start feeling like invincible gods. However, these changes take place only while you use those compounds, and they will disappear once you stop taking them. For instance, before a menstruation period women suffer hormonal changes, which make them behave strange. However, once the hormonal levels are back to normal, their usual behavior returns. The same thing happens here, since steroids are hormones, and this is the reason they are so addictive for those, who feel great on them.