I went in 2002.
We flew out on A321 G-TTIA of GB
Airways, (a beautiful plane). The service is also better than BA
. I flew back on B737 G-OGBC.
There are a number of points of interest.
1. The War Museum in Valletta.
2.Safi which had a C47 and 3 BAC 111. Leave the airport take a left hander, follow the road until the bridge which passes under the runway and then take another left hander.
You will see a gantry by the fence. The locals climb up it, and security does not seem to mind. You can then see the runway/taxiway from the other side.
If you look away from the runway, you will see Safi.
3. The Air Museum at T'Qali.
4. There is also a spectator gallery upstairs at the airport. Much of the traffic is routine, but I saw a B727 owned by the Nomads (N727M) and a B727 and F28 of Libyan Arab Airlines 5A
-DIH and 5A
It is well worth checking the OAG Gazetter.