It's great that we've found so many extra solar worlds out in space, using different methods and perhaps we will soon find more from Hubble & Spitzer, and future missions like Corot, Kepler, NASA's Terrestrial Planet finder.
A lot of those planets discovered in other Solar systems have wonderful names like, hd179949 , hr1084 , OGLE-TR-132 b, 2M1207b, GJ876c, hd168443b, and PSR B1620-26.

I have perhaps seen attempts on giving these world's more regular names like the Tau-Bootes system, Goldilocks-planet or Upsilon Andromedae b

But what kind of names could be given the rest ?
Should we name them after people
Buzz Aldrin's Planet, the DaVinci world, galileo's planet, Yuri Gagarin's world ?

Use Roman or Greek name, or Gods and mythical names like Triton, Rhea....

Or could we use Sci-fi names from Arthur C Clark books, Star Wars films and TV shows ? There are many names in sci-fi fantasty :
Krypton, Persephone, Mongo, Arrakis, Tatooine, Klandathu, Asgard, Caprica, Vulcan-world, Thalassa, Z'ha'dum, Minbar, Zenn-La, Skrull-World, Giedi Prime, Metaluna, Drak, Solaris, Sebecean, Romulus....

if we are to give the planets names, then what kind of names should they be given ?

Maybe we should just leave the naming to the team that discovers them and wait for future missions so we can get a clearer picture of these worlds ?