I am a big wine guy. I have been collecting for 15 years (far longer than tobacco). I lean toward reds but like virtually all types, provided they are blended with skill.
Merlot, being a relatively light red, is easy to get into. The trouble is, once you "crossover" to reds, if you try other great reds, merlot at some point, more often than not, eventually becomes a thing of the past.
Merlot has gotten a bad rap (I won't even mention
that film). Merlot isn't necessarily light - there are many big, bold merlots. Petrus is one of the most respected (and expensive) blends in the world and it is made entirely from merlot. It is thick and dense wine. Duckhorn out of California makes big and bold merlots that are just sublime.
I will be honest here and tell you that, in my view, there aren't many wines in the $10 or under range that I like, but there are many in the under $25 range (mostly from South America). These wines are of the "drink now" variety and generally don't benefit from aging. In fact, about 99% or more of the wine sold in North America really has little in the way of aging potential. I once bumped into a lady at the liquor store who was buying a case of that wretched Yellowtail stuff. We struck up a conversation and she indicated she likes to buy it a case at a time so she can drink two and age 10. I didn't have the heart to tell her that nothing in the world is going to make that vile wine taste any better. In the world of Yellowtail, last Tuesday was a good year.
One more random thought: if you start collecting fine wine make sure it is under lock and key. We were just in Vegas and the mother-in-law stayed at our house and babysat the kids. When I came home she told me that some of her girl friends came over and she grabbed a bottle from the cellar to make sangria. I looked at the counter and to my absolute horror there was an empty 1997 Brunello di Montalcino bottle on the counter. I went to my room and wept. Sangria, I thought. I wept some more.