Sounds very similar to mine, dwarf walls (all internal walls plastered), glass roof, open to the kitchen.
Mine was built just after the building regs on having to have external doors was changed, and our installer didn't fit doors on the proviso that it was one of the things we were going to do.
Aspect faces just north of east.
The only thing is change would be for it to be bigger, and for someone to clean the windows (that would be me then!).
There are a few days a year when it is really too hot, but because it loses the sun by midday this isn't much of a problem. It can also be cold in the worst of winter - and for this reason I am considering doors (but have been considering them for about 15 years and it's so nice the rest of the year that I've never got them).
I usually have a curtain over the space in winter, although it wasn't up last year as I had a kitchen refit and the pole got taken down. I have just got a new curtain to fit in the space rather than over it. The curtain would probably be closed about 3 days a year in the summer as well, but only since we got the dog so keep his space in the utility cool.
Mine has a kitchen table where we eat almost all meals, despite having a dining room. It also has a couple of wicker chairs and we sit in there a lot in the day and summer evenings. I want to get some more comfy chairs, but not sure what to go for as limited by space.
I had underfloor heating (electric) put in, which was nice underfoot but expensive to use. Mostly I just wear slippers (everywhere inside) in winter so haven't used the heating for years. Unfortunately it was damaged as part of the refit so doesn't work now anyway.
I had the floor changed from tiles to LVT, and I think that makes a massive difference to how cold the floor feels, although last winter was very mild anyway.