Gifts and Party Members

Some items (like Alistair's Mother's Amulet) you know by the plot whom you should give them.

For the others:

• Alistair: statuettes
• Dog: bones
• Leliana: church (Andraste) stuff
• Morrigan: jewelry
• Oghren: booze
• Shale: gems
• Sten: paintings
• Zevran: silver/gold bars

A complete list can be found here.

The Dragon Age Wiki has an excellent write up on the gift system as well as which gifts goto which party member.