Obviously, they can have an impact on your electric bill, spare time, distract from social interactions and relationships etc., but we can't seem to get enough of the little blighters!
They're so great!
We have '8' in current service (and two spares [both SFF], used for various projects and troubleshooting).
2 Laptops
1 living room desktop (tower)
2 bedroom desktops (both SFF)
3 desktops in my rumpus room

(2 towers 1 SFF)
(If someone could fix the title, that would be peachy. Was going to add a poll, but ho-hum!)