Last night's bottle of Pinot Grigio definitely got more quaffable as it crept up to room temp.
Yes, white wine is best served chilled, but straight out of the fridge is too cold. Makes sense that you noticed the flavour improve as the wine warmed from too cold to its optimum temperature.
Just googled the list below...
Temp F Temp C Wines
64° 18° Bordeaux (best), Rhone , CNDP, Barolo, Cab. Sauv. (US), Zinfandel (heavy), Brunello di Montalcino
63° 17° Chianti Classico & Rioja (Reserva), Barbaresco , Cab. Sauvignon (Chilean/Australian), Pinotage
61° 16° Bordeaux (most), Burgundy (Nuits & best Beaune), Barbera, Shiraz/Merlot/ Pinot Noir (US)
59° 15° Chianti Classico & Rioja (most), Zinfandel (light)
57° 14° Burgundy (most Beaune), Valpolicella (Amarone)
54° 12° Beaujolais , Valpolicella (except Amarone)
52° 11° Chardonnay & White Burgundy (best quality), Viognier , Red Sancerre
50° 10° Tokay, Sauternes, Beaujolais Nouveau, Bardolino, White Rhone (north), White Rioja (oaked)
48° 9° Riesling , Chablis, Alsace , White Chalonnaise & Maconnais, Gewurztraminer,
Pinot Gris, Pinot Blanc
47° 8° Chardonnay & White Burgundy (medium quality), White Bordeaux, Semillon, White Rhone (south)
45° 7° Champagne/Rose (best quality), Sauvignon Blanc, Savenniers, Vouvray, Pouilly-Fume, White Sancerre
43° 6° Ice Wines , White Bordeaux, Muscadet, Anjou , Asti , White Rioja (unoaked)
41° 5° Rose (cheap), Swiss Chasselas, Vihno Verde, Soave
37° 3° Champagne (cheap)
35° 2° Fridge Temperature
0° -18° Freezer Temperature