Just something to consider:
If you keep trying different recipes and kits, you'll never have any sense of whether the product is getting better.
I think there's value, after every brew, asking what could have been done to make the process or the recipe better....and then, if the beer is something one likes, then seeing if it can be reproduced.
When I started brewing I offered an acquaintance the chance to sample my brew. She said, somewhat unkindly I thought, "I'll be happy to when you can brew the same thing repeatedly."
I thought it was rather rude, but there was a grain of truth in it, specifically, that one really hasn't mastered (if that's the word) the craft of brewing if one can't repeat a result.
Something that's worked well for me is to use a process of continuous quality improvement. I try to do something better every time....and over time, I believe that's made a huge impact on what I'm able to produce.
So if you can find one of these recipes you like, see if you can reproduce it or, better yet, improve it. Bouncing from recipe and kit to recipe and kit is less likely, IMO, to give you meaningful feedback.
My 2 cents. Brew on!
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Nine days ago I brewed a dark lager that has a grain bill somewhat similar to yours: 5# Maris Otter, 5# Munich, 6 oz 20L Crystal, 6 oz Chocolate Malt, 4 oz Chocolate Wheat, 3 oz Cara 8, Hallertau hops. I'm using an accelerated fermentation schedule such that I'm now in the crashing mode, down to 32/0 degrees. When I checked gravity at the end of fermentation I poured the hydrometer beer into a clear glass. Yum! Offered a taste to my wife who took three swallows (!) and pronounced it good. I can't wait for it to be cold and carbed.