I'm into Tai Chi, and Aikido is pretty close to the flavors I've learnt. In my experience it has proved eminently practical in real world situations. One reason it suits me is that for a man, I'm quite small physically (about 5'7", 120 lbs) so I've usually been at a significant weight/strength disadvantage when I've been a target of assault. Being able to redirect an aggressor's strength against them is beneficial in terms of both interrupting the physical attack and regaining the strategic advantage through surprise and confusion; people who make a habit of throwing their weight around tend not to be very sophisticated.

Edit: you shouldn't treat this as advice, of course. I come from an abusive background and got bullied a lot growing up, so while I avoid starting fights under any circumstances I'm not beset by fear or panic on the rare occasions where someone tries to make trouble. Petty criminals rely on others' being fearful and usually don't have an alternate strategy.