I like Object Pascal because it reads well and elegant in its presentation of the program. Sadly, FPC/Lazarus have hard to use, flat namespacing systems, but I suppose this is no worse than C.
It seems like Object Pascal is still lacking some intertia, making it hard to use. I spent a lot of time getting things working with FPC/Lazarus, and then getting them working.
The internals of FPC seem very approachable, and FPC supports many architectures. I hope Object Pascal increases in popularity. At the same time, I am personally looking for a compiler that is suitable for formal verification, and due to this, work on one not designed for it seems a waste of time.
There are some "killer features" like anonymous procedures or functions that have not been implemented. It seems like development has slowed.