Here are some packets you might enjoy.

PKT1.   World-wide diversity:  100 stamps, 50 countries, no more than 3 stamps any one country.  .        3.50
              50 % pictorials.  Good starter pack

PKT2.     South America diversity:  100 stamps, 50% pictorial.                                                                  4.00

PKT3.     Central America diversity:  100 stamps, 50% pictorial.                                                                4.50

PKT4      Poland:  100 stamps, includes some better.  50% pictorial                                                           4.00

PKT5      Poland:   75 definitives, including  earlies                                                                                      3.50

PKT7       GB diversity, 150 stamps, 60% definitives                                                                                   5.00

PKT8       GB pictorials, 100 stamps, including many post 1990 issues                                                         7.00

PKT9       GB definitives, 100 stamps, including many post 1990 issues                                                        4.00
                 Expect a good supply of Machin heads, but some earlies too

PKT10      South Africa diversity.  100 stamps, definitives and pictorials                                                        6.00
                   Not all face different.  Expect watermark and perforation variants

PKT11      European diversity.    150 stamps, includes GB, Belgium, Germany,etc.                                        6.00

PKT12      Belgium diversity.       100 stamps, 60% definitives                                                                       5.00

PKT13      German diversity         100 stamps, including Deutches Reich and Deutches Bundespost               6.00

PKT14       Early German   50 stamps, all prior to WWII                                                                               6.00
                    Virtually all definitives

PKT15       Russia diversity           150 stamps                                                                                               6.00

PKT16       Japan diversity            100 stamps, including some early definitives                                                6.00

Ask about availability of other packets that you might want.