Modern.
If I won the lottery, I think I'd like a barn conversion or something.
However, on a modest budget my preference is for 1930s houses.
Dislike Victorian terraces the most - in my opinion they so often do not have character, you find row after row of identical houses - there's nothing distinctive or characterful, when they're all the same. Furthermore, I really dislike the layout of most Victorian houses (unless they've been heavily updated!) the narrow galley kitchens, the bathroom at the back of the kitchen, the over large dining rooms and comparatively small living rooms, the one massive bedroom and then the tiny box room and they never have straight walls, clean lines and are expensive to heat (unless someone has spent a lot of money modernising them). They're pretty but just so impractical. I also dislike the straight roads of Victorian houses, with loads of cars outside. They're not conducive to children playing outside and so lack a bit of community.
However, I equally dislike the really modern house (built this century). Those really have tiny gardens, lack of decent parking, small rooms and the modern estates are so imposing with no front gardens, and all the houses built straight onto the street. I also dislike the modern trend for all the houses looking different to each other, it looks kind of odd.
My house is a compromise house - it was built in 1990, old enough to have a decent sized back garden, rooms are big enough, internal walls are mostly brick, but it is on a very nice road, where the children can go out to play, cars are off the road, it's a bendy road so cars drive slowly and it is safe. The estate is pretty to look at (all built in Cotswold stone) where everyone has got gardens and the houses face in different directions, so it is not all overlooked. I like the fact that the rooms are all decent (kitchen diner and large living room) and it services our needs.
If I could buy any modest house, I think I would buy 1930s (the type with the bay windows). To me, that has the best compromise between practicality, individuality and nice features.