Wine is definitely an acquired taste - however once you acquire it, wine's gorg!
I was told something in a wine bar by the owner once that I've found to be true (I did lots of testing to be sure...
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Old world wines (Spain, France, Italy, Portugal)that are bottled on the estate where the grapes are grown tend to have less additives and are less hangover-y than new world wines (South Africa, Australia, NZ, USA/California)
The reason is that in the new world, because the roads and transport are available, they tend to put the grapes in large tankers with preservatives, and send them hundreds of miles down the road to be bottled.
In the old world, where they have been making wine for hundreds of years, no such transport existed so they bottle the wines right beside the vineyards. No horrible chemicals added to the wine.
I switched to wines from the old world - no more hangovers! (unless I drink too much...)
Also oak aged wine is a bastard for giving me a headache - particularly Chardonnay (Tatty you're mad! 
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I agree re Pinot Grigio though - lovely stuff. In summer sometimes a quarter glass of white with three quarters of soda water is a lovely spritzer and a nice way to drink wine without a strong taste.
If you really want to get into wine, are you anywhere near a wine bar/restaurant that is doing a food/wine tasting? Went to one recently - the chef cooked 3 dishes in front of us, after the demo the sommelier gave us 4 different wines to taste - and we had a plate with a small serving of each of the 3 dishes the chef has prepared. Plus there were a couple of glasses of cava during the food demo. Total cost was about £40 - so covered small dinner, couple of drinks, and a cookery demo/lesson. My sis and I took our mum for a Mother's day present, it was a great way to have a reasonable night out in a posh restaurant - and we gots lots of Brownie points from our mum!