My views have changed significantly over the last few years. I always rode cruisers until they just got too big and heavy for me and my abilities. I fooled myself into thinking I'd never ride anything but a cruiser.
Then I found the CTX, then slowly worked my way into the ADV world with a V-strom and now the Versys.
Last summer I bought a used 2007 EX500 Ninja. What a blast that thing was to ride!!! And I never thought I'd be on a sports bike.
So I know what you're feeling...it IS addicting to ride those things!!! I sold the EX but wish I had kept it. It was just so much fun to zip around on it!
With that said, if I was to get another Kawi, it'd probably be a Ninja650. They feel comfortable to me and since most of my riding is commuting and one summer out of state(s) trip I'm thinking that's the direction I'm going in on my next bike purchase. I really like those FJR's but I'm beginning to think they're just not practical...until I'm retired.
So, I'd keep the one that you ride the most and for the purposes you need it for. Always "fun" to own more than one motorcycle but then you have the dilemma you're in now...which one gets ridden, and which one sits. (Plus the extra costs that comes with extra motorcycles!).
I'd ask myself...which one do I "need" and which one do I "want".
Funny, I am in the exact opposite situation, as I rode for almost 25 years before I even swung a leg over a cruiser. There was a sort of personal bias, but I started on super sports (had 2 R6s before I stepped up to a R1), while I had the R1, I was commuting on it daily, and my brother ended up giving me his V-Strom 650; which instantly became my commuter. The R1 ended up being totalled by a left turner who struck me, so I rode the V-Strom daily and replaced the weekend bike with several different "experiments", a FZ6R, ZX6R, CRB1000RR, and another R1. In 2014 we moved quite a ways away from where I work, and I got rid of everything but the V-Strom and picked up a new Mustang GT. Eventually the Mustang took over as my commuter and I sold the V-Strom and put all of my gear into boxes and into the garage; but my heart still longed for 2 wheels.
When my wife had a medical emergency it put some things in perspective for me, and I decided I would sell my Mustang to get her the car she had been wanting for a few months (after my brother bought the same car and she fell in love with it). The Mustang made a nice dent, and huge down payment for her new car, and left me with enough to get back on a motorcycle. I went to buy a Yamaha FZ-09, but while I was at the dealership I swung my leg over the Versys that now belongs to me, and has racked all of my miles through the winter until earlier this month. My younger brother decided he wanted a cruiser, after my wife and I found him his dream bike and bought him a used ZX14R. At the time he had a FZ6R that was his weekend ride, and it was being neglected for the ZX14R; so he asked if I could work a deal for a trade. After several attempts from Craigslist and Facebook Marketplace, I reached out to the dealership that I bought my Versys from and negotiated a straight trade, his immaculate 2012 FZ6R, for a low mileage Yamaha V-Star (XVS1100) Custom. I didn't get to ride it until we got it all the way home, but I was instantly taken by the cruiser bug. After looking for a couple weeks, and reading quite a bit, I added a VTX1800F3 to the garage next to my Versys. Needless to say the VTX has been my commute animal for the last few weeks and I am really loving it!
TL;DR - After riding for years I finally tried a cruiser, and then 2 weeks later, bought one to keep my Versys company.