Never tried giving advice, but here goes...
If you want a calm positional game with white, you might want the QG or Catalan, though it's up to black if he wants to play d5.
The closed Sicilian and the English/Reti (sometimes) leads to a slow-paced game that is also a joy for positional players.
Most gambits would lead to complicated lines, and the KG or any others are also good.
If you want a 'good old' opening that requires hours of intense study, you can always go with the Spanish game or any line in the Sicilian.
Or, you can go onto lesser lines like the KIA or even the Bird's, if you feel really comfortable with them
As black, the Petrov against e4 can be very annoying for white players as it has a very high draw rate. The QGA gives white a small advantage but black can play it out. The Orthodox is rather prone to the Minority Attack. The slav/semi slav is similar to the QG. The Nimzo/Bogo/Queen Indian lines are like a mix of positional game and memorization of lines. The KID can lead to sharper lines.
The French is good if your opponent doesn't know all the lines, or else I would avoid it as black. The Caro-Kann is ULTRA-solid, though the advance variation gives me headaches. The Sicilian and Ruy Lopez require hours of intense memorization of lines, but the Dragon and the Marshall can be fun lines. The Benoni is positionally weak, but if properly played can be dangerous. The Dutch is like a mix of Tactical/Positional/memorization, and is good against those who don't know its lines. The English can be countered by the solid hedgehog.
I know this can't be a new topic so I apologize ahead of time for not doing a search but has anyone come across a good book on building an opening rep? The only advice I seem to continually come across is that it should fit a player's personality/style. OK, I can see that but the books seem to either try to cover all openings and lack depth or are highly specialized and lack breadth.
Maybe a book that groups openings by style (agressive, conserative, etc) and/or by common themes such as middle game objectives hoped to be reached using that particular opening.
It sounds like I'm trying to avoid a lot of research but isn't that what chess books are for?
Anyone?