Creeping Thyme between paving.

Personally l think it looks nice and will give a nice scent when you walk over it. However, it could possibly destroy the cement between the slabs, will let water in and make the slabs uneven.
I have self sown plants between my pavers in the courtyard, but the pavers are well bedded in and I occasionally clean the plants out between the gaps.

Thank you. The cement between the slabs has cracked up and will be costly to repair again. I guess I will have to keep it trimmed.