My favourite opening is the Vienna gambit.
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This is my favourite *trap*, which is sure to wipe the smug Sicilian smile off your opponent's face if they fall for it.......
1. e4 c5 2. Bb5 a6 3. Bc4 b5 4. Bxf7+ Kxf7 5. Qh5+ g6 6. Qd5+ e6 7. Qxa8
If black doesn't resign then be sure to play very carefully so that your queen doesn't get trapped.
i've recently started playing the Goring Gambit (Scotch Gambit)
1.e4 e5
2.Nf3 Nc6
3.d4 exd4
4.c3
I also like the good ol'fashioned Italian game for white (or black)
Im working on the English, but i dont care for it much.
Occasionally i will play d4, Since i've had some success with the Colle System, and Queens gambit.
For black, nimzo-English against the Eglish, Nimzo-Indian(or Queen's Indian), Slav, QGA, or QGD against d4, French, Sicillian Dragon, or some good ol'fashioned e5 (and we'll see what happens) against e4.
For the Reti opening, i would like it to transpose into some d4 game, but it always seems to transpose to an English game.
As far as openings go, keep your options open, experiment to see what fits you best. Before, I was a die-hard 1.d4 fan, but now-a-days it seems all i play is 1.e4.
One thing though is I hate the Ruy Lopez, Exchange Variation. It always seems to end up in some complex Rook Pawn Ending, and it just takes forever to finish.