I am just finishing Baldurs Gate 2 for the first time (most of the way through Throne of Bhaal now), and I have to say it makes me sad. It is so much better than any other RPG I have ever played, and I know I have no chance of ever finding another game as fun and in depth since it is 14 years old with nothing coming close since. The funny thing is this feeling has nothing to do with nostalgia, since I had never played it before a month ago when I bought the EE version on Steam.
But if Baldurs Gate Enhanced Edition, and Baldurs Gate 2 Enhanced Edition are too tough to get into (the UI was horrendous in the original - enough that I got sick of fighting it on the GoG version, but the EE made it slightly more managable), I would go with Dragon Age as many others have. It is a far less indepth game, but still fun and easy to get involved in.
You like Baldur's Gate; get Planescape: Torrment; it is regarded as the best rpg bar none. Some flip with BG2; but to me and lots; lots others; that is the gold standard which all others must be judged by. The writing; the humor; game play, lore, music......perfect