My LGS just started a new Warhammer 40k league and I was torn on which army I should play.
I've been in love with "assemble painting" lately and I've been disassembling models to paint the individual parts and reassemble them when I'm done. I have been carefully removing guns and backpacks, riders, and turrets so that I have an easier time of getting a nice even coat of paint and washes on the model. This process has also left new models, like my Ad Mech Skitarii, just sitting in piles waiting to get painted; and unfortunately unplayable.
When I started playing miniature games, I would literally buy models the same day I was going to play them. I had a pair of needle-nosed pliers in my army/tackle box to bend the tabs on metal models and plastic models were mostly one or two pieces and I would slap them together minutes before I played.
With so many of my armies just in components, I didn't have a lot of options on what I could play in the league. I watched a battle report from TableTop Tactics that featured an Ork army similar to mine and I decided to break out my greenskins after nearly a decade of being in the box. They were my first 40k army and are covered in seams and sloppy paint jobs but they still hold a special place in my heart.
My army was built before Lootas were available and I think they will be next purchase if I decide to expand on my boyz. The amount of fire they can put out is amazing and I think they're fairly under-rated in the current meta.
However, I have decided that I'm going to try to limit my painting and focus on my 30k Salamanders and 40k Mechcanicus for the time being so I can start playing them sooner.