Variety is good but not necessary.
I have been building and painting models since around 1980. I have quite a few bottles of paint. I prefer bottle to pots for the obvious reasons but I deal well with the pots I have.
I have complete sets & by complete, I mean every single one in the entire range of the following:
Vallejo Game Color,
Vallejo Game Extra Opaque,
Vallejo Model Color,
Vallejo Model Air,
Vallejo Pigments,
Andrea Color Paints (60ea.),
All the Andrea Color Paint Sets (ie. Flesh, Red, Black, White, ect.),
Andrea Pigments,
MIG Pigments,
Forge World Weathering Powders,
Reaper Master Series Paint (MSP),
MSP High Density,
Bager's Minitaire,
Privateer Press Formula P3,
Games Workshop (the previous set),
Games Workshop Foundation Paints,
Van Gogh H2Oil (water soluble oil colors that require no solvents and can be thinned with water)
In addition to this I have several bottles of Daler Rowney FW Acrylic Artist Inks, Tamiya Color Acrlyic Paint, MIG Productions 502 Abteilung Oils and a few other brands for trials for various techniques.
Of all the paints I own the Vallejo paint ranges are the ones I use the most and the GW paints the least. My newest additions are the Andrea Paint Sets which I am starting to love. They are proving to be very useful and they speed up things quite a bit. I have many paint ranges for a few reasons, first with many different ranges I get many shades, tones and hues of a color. I probably have 60 different Reds to choose from. With this in mind blending is much faster because I don't really need to mix colors. I just grab the next darker or lighter color and go. Without the need to mix much, color consistency is not much of a concern. I can easily paint an army with consistent colors across the entire army. Second, I love variety. I like having plenty to choose from.
Now, does this mean you need all this? Of course not. With what I now know I would advise a new person entering the hobby to buy, if they can afford it, the Vallejo Game Color Set, Vallejo Model Color Set or the Reaper Master Series Paint set. After you get one of these sets in their entirety you won't need much else. Once you've had the opportunity to use them you may want to try the Andrea and Privateer Press Formula P3 paints. They're also very good but don't have the variety of Vallejo or Reaper.
Please bare in mind I've been painting miniature since I was 14 years old, stopped for a bit while in the Army for 22 years then picked up with my full attention in 2005. Now, I'm retired and all I do is shoot and clean my weapons, take care of my kids, and paint miniatures. Life is good. I'm about to buy the new Scale75 paints from Spain. I hope this helps.
Good luck and stay frosty.
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