It's not just about "kerb appeal" it's about "web appeal". So many, if not most, potential buyers look online first. And most properties have a picture of the exterior as their main picture - any property that doesn't looks suspicious IMO. So it's really worth having the front of your property looking good.
Also, if the interior is as attractive as you say, make sure you get good (but accurate) pictures of it. I think many estate agents who otherwise presumably have a lot to recommend them are shockingly bad with a camera. If you look at Daft or MyHome you can see a dark, cramped, dirty house on the same road as a bright, airy, clean house with loads of storage - and they are the exact same house-style and plan, just with different estate agents and pictures. At least in that case you can see both houses and realise that the small cramped one could become the bright airy one with a little TLC, but if yours is a one-off house (as it sounds) then you don't have that advantage.
Also buyers now don't have spare cash to invest in a property beyond the purchase price, so I think it's more important than it used to be to have a property in "needs no work done" condition (unless it's a total fixer upper).
One last thing, if your house is a one-off house then I think it's worth including a floorplan (doesn't have to be to exact scale) in with the pictures.