I personally prefer new build, and have only bought new build to date.. I have just put my money down for a new build town house - ready end of September.
I like the fact that it is MY house; not a second hand one.
It is clean, and done as I want it (to the most extent). I have chosen kitchen units. tiling and flooring. I've made some addition and some changes to the standard spec.
We will only have a smallish (compared to say a 1930s semi, which was our alternative in priice range) garnden, but that is fine by us. It will be easy to maintain, and the site where we have bought has a privately maintained playground for children and bike routes around the estate too.
We will have a utility room and a dishwasher in the kitchen - something we were struglling to get in an older house. And we have an ensuite to the master bedroom, again not common in older house unless recently refurbished.
But we are paying a bit of a premium to have new build I guess.
In the end, though it is mainly down to personal preference. I have always preferred newer houses, as has DH. I'm afraid a 1930s semi or similar does nothing for me, and I am not into period features, real or otherwise. I prefer clean, white, modern living.
Also, neither of us is into DIY and maintaining an older house is just not for us. And neither is maintaining a larger garden.