It has, I think, become clear in the course of this thread: that the gamut run between "thrilling" and "boring" differs much, for different people, according to what appeals to them -- enthusiasts and "normals / punters" alike. Feel that those old Romans nailed it; "De gustibus non est disputandum".
The Leighton Buzzard Light Railway has suffered over the years as the town has expanded.
It's route through what was originally open countryside is now bounded on one or both side by housing estates and industrial units for a significant length of the journey.
I'm quite a fan of the LBLR. Agree that the housing estates / industrial units most of the way, are less pleasant than the (unspectacular) open countryside which obtained when preservation began on the line; but I find this railway so engagingly weird, and -- no offence meant, but crudely put-together (right from its industrial inception): that I can live with its having been mostly swallowed by creeping urbanisation -- scenic delights have never been what it has first and foremost, been about.
On the scenery front, the East Lancs is unspectacular at best... luckily in terms of a museum railway for people who are more interested in the railway than the landscape, it's hard to match.
Have not so far been to the East Lancs.; but my impression has always generally chimed in with "as above". Influenced on my part, by my having an unfortunate loathing of that particular part of the country (sorry, South Lancashire folks !). Should fate take me to those parts -- not necessarily ruled out -- I would probably visit the ELR; expecting highly uninspiring environs, but within same, a steam-railway experience worth having.
I never really understood the purpose of the Gloucestershire Warwickshire Railway at Broadway.
As if there weren't already enough preserved ex-GWR lines of greater scale and interest (notably the Severn Valley).
The scenery is pretty flat too.
I visited the Gloucestershire and Warwickshire Railway a month ago and I actually really enjoyed it. The scenery isn't the best but still pretty nice and I enjoyed seeing the facilities at Toddington. They also have a very good selection of both steam and diesel locos as well- there were not one but two Bulleid Pacifics running when I was there, which is always a great experience, although admittedly 34028 Eddystone was visiting from the Swanage Railway.
I truly like the Gloucestershire Warwickshire -- somewhat inconsistently, in view of my general dislike of preserved lines running in nonsensical physical isolation from the existing national system. (Am sure that this is very often, not what those running the lines wish for; but is what fate has handed to them -- and if, as hoped, the "Glos. / Warks." ever reaches Honeybourne, that will restore a wider-system link.) I find the line's scenery perfectly agreeable-verging-on-impressive; but I'm from the east of England, where they truly know about "flat"
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My fondness for this line has a bit to do with -- it; and the Severn Valley; being the two major preserved lines nearest and most easy of access, to where I live. I duly reckon the SV magnificent -- but, "one thing and another"; fine but, I find, "samey" scenery -- and / or maybe just too many visits to it over the decades (re motive power -- see quote from
@coradiafan2000 below -- I'm really not bothered so long as it's steam) -- reckon that I like the Glos. / Warks., in part just because it's so different from the Severn Valley; which latter, gets to pall on me a bit. Feel like the little girl in Richmal Crompton's writings: "It's delicious, but I don't like it".
I think different people have different preferences when it comes to preserved railways. I couldn't care less if the scenery is bland if I get to ride behind a Merchant Navy or a Hall. That's why I haven't been to the Severn Valley yet, as every time I've looked to see what's running on days when I would have been able to visit the most exciting thing they've had available is a Pannier tank.
Says it all -- different people, different preferences, over a variety of different matters.