So for the "nightfighter" category, I have a Promodeller Bf110G-4 which, as I discovered after I bought it for 15 bucks, has a serious dimensional issue with the engine nacelles. I've not looked into it deeper but I assume it's fixable with either after market parts or by building up with putty.
Failing that, I have a Hasegawa Bf109K-4 and a scary ICM Spitfire Mk XVI low back moulded in soft, white plastic. The 109 is potentially the most straight forward build and would take up the least amount of shelf space.
Then again, I could call anything left in my stash my "favourite aircraft" and no-one would be the wiser.....