Might & Magic VI.
I've just recently started M&M VI again, too.
Just got my party through the Temple of Baa and they're up to lvl 9. It's held up quite well and I'm remembering why I loved it so much the first time around.
The Temple of Baa went more quickly than I remembered, and my son was impressed by the mass of skeletons that showed up when I took the gong.
Unfortunately he was so impressed that he played M&M VI over the weekend and I didn't get a chance at it.
Meanwhile, I finished up the Dragoons' Cavern and moved on to Free Haven to buy some travel-easing spells. M&M VI has definitely held up well over the years. I bought it on release day and never regretted it; this time, maybe I'll even finish it.