I had DD2 when DD1 was 2 years 9 months. Both DP and I wanted them close together and we didn't want dd1 to be an only child. It is a bit of a juggle but I find if you manage your time efficiently and have a supportive partner it makes life a lot easier!
Having them close together means we get the baby junk out the way faster, the toddler stage will be over in a few years. Sure I have to sacrifice my life and my interests for a few years but so be it, there's plenty of time to get back to all that stuff when the kids are older!